Câu 28: Cho tam giác ABC vuông tại A, có ∠A = 60⁰ .Tia phân giác của góc B cắt AC tại D. Kẻ DE vuông góc với BC tại E.

a) Chứng minh: △ABD = △EBD.

b) Chứng minh: △ABE là tam giác đều.

Ai đó giúp mềnh zới ạ. Mình cảm ơn :D

Câu 1: Em hãy kể các môi trường mà âm thanh có thể truyền qua được và các môi trường mà âm thanh không thể truyền qua được? Hãy nêu tên một số vật liệu thường dùng để ngăn chặn âm, làm cho âm truyền qua ít.

Câu 2: Khi nói to trong phòng rất lớn thì nghe được tiếng vang. Nhưng nói to như vậy trong phòng nhỏ thì lại không nghe được tiếng vang.

a) Trong phòng nào có âm phản xạ?

b) Hãy tính khoảng cách ngắn nhất từ người nói đến bức tường để nghe được tiếng vang. Biết vận tốc âm trong không khí là 340m/s.

Câu 3: Có thể làm cho một vật nhiễm điệm bằng cách nào?

Câu 4: Giải thích tại sao vào những ngày thời tiết khô ráo, đặc biệt là những ngày hanh khô, khi ta chải đầu bằng lược nhựa, nhiều sợi tóc bị lược nhựa hút kéo thẳng ra?

Giúp mik vs ạ ('-'

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to complete the following question.

Q5:  Traffic accidents can be prevented if people .................. the rules.

A.  obey            B.  remember                      C.  go on                D.  take care of

Q6:  It stars Marlon Brandon as the Godfather. He won an Oscar for his .............. as a boss.

A.  direction          B.  action               C.  performance                  D.  plot

Q7:  Janet: “Would you like to go to the movies this evening?” - Susan: “…………”

    A.  You are welcome.

    B.  That would be great.                                 

    C.  I fell very bored.

    D.  I don’t agree, I’m afraid.                           

Q8:  I'm sure you'll find the film ......................

A.  amused             B.  amusing             C.  amusement                    D.  amuse

Q9:  They felt ...................... after seeing the film.

    A.  boredom         B.  bore                C.  bored                             D.  boring

Q10:  .................... do you go to the Music festival? - Almost every summer.

A.  Who                B.  When               C.  How                               D.  Where

Q11:  The festival ................... place in a remote area.

    A.  took                 B.  held                      C.  saw                     D.  looked

Q12:  On Thanksgiving, families and friends ............... to have a feast.

    A. meet               B. arrive                 C. gather                 D. appear

Mark the letter A, B, C or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation.

Q13: A.  ahead               B.  mistake          C.  plane                   D.  break

Q14: A.  watched            B.  walked            C.  laughed               D.  played

Choose the correct answer A, B, C or D to complete each sentence.

3. The movie on TV last night made me_________.

A. bore                     B. bored                      C. boring                     D. boredom

4. Did he ________ for Manchester United?

A. used to play            B. use play                C. use to play            D. used

5. Mr. Beans Holiday is a ________ film - I was laughing from beginning to end.

A. hilarious                 B. violent                    C. scary                       D. moving

6. There ________ a big flower shop here, but it was moved.

A. were                B. used to was             C. use to have             D. used to be

7. The play was so boring. ________, Hoa saw it from beginning to end.

A. Because          B. Despite                   C. However                 D. Although

8. If you do not have______, you will not able to drive on the road.

A. helmet                 B. driving license   C. road signs            D. traffic jam

9.________ is Halloween  festival held? It’s held at the end of October.

A. How              B. Whose                    C. When                         D. Where

10. Tuan _____________ yet. I’m still waiting.

A.    didn’t phone     B. won’t phone        C. hasn’t phoned      D. haven’t phoned

11. Although he was a poor student, he studied very well. (In spite of)

➜ In spite of _____________________________________________.

12. I usually stayed up late to see the film last year, but now I don’t.

➜ I used ____________________________________________.

III. Complete each question with a suitable H/ WH – question word. More than one question word may be accepted:

1. Look at this photo! …………were you doing with the candles?

2………………did you stay when you were in Hanoi?

3. ……………..do you pronounce the name of the festival?

4. ……………..festival does your brother prefer the Tesselaar Tulip or the Tulip Time Festival?

5. ……………..do people celebrate Diwali?

6……………….did they arrive in Da  Nang? on 29^th April?

7. ………………did you watch this film? – Because it was interesting.

8………………..do you go to the festival?- once a year.

IV. Complete the description of Diwali. Fill each blank with the correct form of the word in the brackets:

            Diwali, the Hindu Festival of Lights, is the most important holiday of the year in India. Special Diwali(1. celebrate)………………are held across the country in October or November. The festival shows the( 2. culture)……………richness of this country. People open their doors and windows and light candles to welcome Lakshmi, the Goddess of Wealth.  They also enjoy traditional music and dance (3. perform)…………………….and watch fireworks. Also, people can watch (4. parade)………………….with beautiful floats. There is a very strong(5. festival)…………………atmosphere across India during Diwali.

V. Chose the word to fill in the gaps among A, B, C, or D:

            Two of the most important holidays in the united state are Independence day and Thanksgiving Day. The fourth of July marks the American declaration of independence from Britain. Most towns, big or small, celebrate the fourth of July with parades and fireworks. Families(1)………………..with barbecues or picnics. Thanksgiving Day is celebrated in Fall, on the fourth Thursday in November. It is a day (2)…….....people give thanks to the harvest. Most families (3)………..a large dinner with roast turkey. (4)………………… Independence Day and Thanksgiving are national (5)………………………

1. A. celebrating         B. celebration C. celebrate                 D. celebrated

2. A. where                 B. when           C. which                      D. in which

3. A. have                    B. buy             C. help                         D. take

4. A. Besides               B. Both            C. Either                     D. Nor

5. A.chances               B. months       C. holidays                  D. times

I. Make questions for the underlined parts:

1. They decorate their house with beautiful Christmas trees

…………………………………………………………………………….?

2. I don’t like ice swimming because it’s dangerous.

……………………………………………………………………………..?

3. You can watch folk music performances in Russian Winter festival

……………………………………………………………………………..?

4. Last year I went to Thailand with my parents

……………………………………………………………………………..?

5. This festival is held in my country every two years

……………………………………………………………………………..?

6. I prefer Thai food to Japanese food.

………………………………………………………………………………?

7. Those are my granfather’s pictures.

……………………………………………………………………………….?

8. They celebrate the festival after harvesting the crop.

………………………………………………………………………………..?

II. Change into passive:

1. They are carving eggs in this room.

Eggs……………………………………………………………………….

2. Many workers have built this street for a long time.

This street………………………………………………………………….

3. They will receive many clothes on this programme.

Many clothes………………………………………………………………

4. They speak English in Canada.

English…………………………………………………………………….

5. They don’t water the vegetables today.

The vegetables…………………………………………………………….

6. The students watched “ Titanic” film on VTV2 yesterday.

“ Titanic” film……………………………………………………………..

7. Have your parents made this food?

Has this food………………………………………………………………?

8. The engineers can design this building easily.

This building……………………………………………………………….

Finish the second sentence so that it has the same meaning as the first. (1.0 point)

   a)  Although he was tired, he wanted to watch the film.

→ Despite being tired/ his tiredness, .................................................................................................................................

   b)  The distance between Ho Chi Minh city and Vung Tau is about 120 km.

→ It...........................................................................................................................................

   c)  She has been nominated for Best Actress several times. She has never won it.

→ In spite of ..............................................................................................................................

   d)  I had a dog when I was a kid but now I don't.

→ I used ...................................................................................................................................

III. Read about traffic problems in two cities. Match the city with its problem. (1.0 point)

A. Ho Chi Minh City

B. Bangkok

Bangkok is world renowned for its terrible traffic problems, so getting around on the roads is a bit of a nightmare. In my opinion, there are 3 main causes of Bangkok traffic jams. First, the quality of public transportation is low. Bus is of low quality and causes congestion. Second, the BTS and MRT are not enough for users. Finally, the most important cause of traffic jam is car accidents. Bad bus drivers cause accidents frequently and make the road stuck for hours.In Ho Chi Minh City, it is not strange to see the sight of a street that is crowded with vehicles. People cannot move and their health is affected by polluted air from exhausted fumes. What are the reasons? The citizens in the city use many personal vehicles to go from one place to another. They aren't used to transporting by public transports. May be because the bus drivers are careless, impolite to them or the taxi fare is too high for some people.