Câu 5. Cho 25,55g hỗn hợp gồm Fe và Zn tác dụng vừa đủ với dung dịch HCl 2M thu được 8,96 lít H2 (đktc).

a) Tìm % khối lượng của Fe và Zn có trong hỗn hợp ban đầu.

b) Tính thể tích dung dịch HCl 2M cần dùng.

c) Tính CM của mỗi muối tạo thành sau phản ứng. (Giả sử thể tích không đổi)

 Give the correct form of verbs:

Mr. Thomas does not allow people (smoke) _____ _____________ in his office.

Huong never lets me (borrow) ______ _____________ her books.

They don’t have much money. They can’t afford (go)_____ _____________ out very often.

I wish that dog would stop (bark)_____ ________. It’s driving me mad.

It is no use (wait) ___________ ____________ for Mike.

I waved to Karen but I failed (attract)  her attention.

It is a waste of time (read)  ___________ that book.

Jim is 65, but he isn’t going to retired yet. He wants to carry on (work)   ___________ .

We were hungry, so I suggested (have)   ___________ dinner early.

Our neighbour threatened (call) ___________the police if we

He surprised us all by (go) ___________away without (say) ___________ ‘Good-bye’.

Don’t forget ___________ ( give) her my regards.

They find it is very difficult ___________ ( understand) her.

She refused ___________ ( answer) my questions.

He regrets ___________ ( spend ) too much on computer.

Give the correct form of verbs:

My parents expected me ______________ (live) an honest life.

I didn’t know how ____________ (get) to your house, so I stopped ____________ (ask) the way.

Having heard about the film, we decided ______________ (not/ go) to the cinema.

It’s no use ____________ (advise) him. He never allows anybody ____________(give) advice.

Tom regrets ____________ (spend) too much time ____________ (play) computer games.

 Mary helped me ________ (repair) this fan and __________ (clean) the house.

It was difficult ____________ a date which was convenient for everyone.( made)

I now regret __________ (say) what I said. I shouldn’t have said it.

Why do you keep ________________(ask) me question? Can’t you leave me alone?

I refuse _______________(answer) any more questions.

Viết pascal các bước để giải bài toán.

“Nhập vào số a. Kiểm tra số a là số âm hay dương”

Cơ thể 6n được tạo thành do dạng
biến dị nào sau đây?
A. Đột biến dị bội thể.
B. Thường biến.
C. Đột biến gen.
D. Đột biến đa bội thể.

Verb form:

1. Would you mind (give) ______ __________me a hand?

2. They are used to (live) _________ ___________ in this country.

3. The boy has promised (not/go) _____ _____________ to school late.

4. She tried to be serious, but she couldn’t help (laugh) _____ ______________.

5. They didn’t make me (explain) _______ ________ why.

6. Mr. Thomas does not allow people (smoke) _____ _____________ in his office.

7. Huong never lets me (borrow) ______ _____________ her books.

8. They don’t have much money. They can’t afford (go)_____ _____________ out very often.

9. I wish that dog would stop (bark)_____ ________. It’s driving me mad.

10.It is no use (wait) ___________ ____________ for Mike.

The teacher stressed the ______ ________ of learning English in the modern time. (important)

You need to be more ________ __________. (decide)

He always solves every problem ________ ______________. (science)

Rebecca is a ______ _______ person. She knows everything. (knowledge)

Local _______ ___________ are listed in the newspaper. (entertain)

People in areas with drought are suffering from severe _____ ________ of water.  (short)

We have some _______ _____ problems with the new computers. (technique)

Let’s skip the ______ ___________ and get straight to the facts. (introduce)

Most of the ______ ____ agreed that the fewer the restrictions imposed, the better it was. (village)

Don't bring those _____ _______ boots inside! (mud)

Ở độ cao nào so với mặt đất thì gia tốc rơi bằng 1/16 gia tốc rơi tự do ở mặt đất. Cho bán kính trái đất là R = 6400km.

nhận xét chung về quan hệ giữa các vật trong vũ trụ ?

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions 

1.  Start early or we’ll get there late!

A. If we start early, we’ll get there late. C. We’ll get there late if we don’t start early.

B. If we’ll get there late, we start early. D. Unless we don’t start early, we’ll get there early.

2. “I met my old friend in this store yesterday,”she said to me.

A. She said that she met her old friend in this store the day before.

B. She told me that she had met my old friend in that store yesterday.

C. She told to me that she had met her old friend in that store the day after.

D. She told me that she had met her old friend in that store the previous day.

3. “We’ll call you tomorrow, Jack,” they said.

A. They said that they will call Jack the day after. C. They said they would call Jack tomorrow.

B. They told Jack they would call him the day after. D. They said they would call him the day after.

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions

4. If I were you, I would not do such a rude thing.
A. Were I be you, I would not do such a rude thing.

B. Were I you, I would not do such a rude thing.

C. Were I to be you, I would not do such a rude thing.

D. Was I you, I would not do such a rude thing.

5. She wants to study abroad. She’s trying to learn English.

A. She wants to study abroad because she’s trying to learn English.

B. She wants to study abroad in order to learn English.

C. Thanks to her learning English, she can study abroad.

D. She’s trying to learn English so that she can study abroad.