5. C. play => playing

6. A. like => likes

5. C. play -> playing

Cấu trúc: interested in + N/ V-ing

6. A. like -> likes

Cấu trúc chắc bạn biết r :vv chia động từ thêm s/es vào với chủ ngữ là he she it

5D

6B

7C

8A

9C

10B

11B

12A

13C

14C

a không những mà còn

b hay

c do nên 

d hãy bởi vì

e nếu thì

f và

g tuy nhưng 

h 

i tới

chúc bạn học tốt

(sorry vì đã làm bạn chờ lâu)

1.started smoking cigarettes a month ago

2. to walk at twenty minutes to school every morning

3.I haven't seen my uncle for two years 

4.going to the movies tonight?

5.so stayed at home from school yesterday

6.me three hours to make...

7.gardening at the weekend

8.để nguyên vế sau

10.watching...

11.Minh ....

12.seen her since 2001

1. The last time he smoked was a month ago

2. it takes me twenty minutes to walk to school every morning.

3. I haven't seen my uncle for two years

4. Let's go to the movies tonight.

5. July had a high fever, so she stayed home from school yesterday.

6. I spent three hours making this pottery jug

7. My father enjoys gardening at the weekend

8. What about going swimming this afternoon?

9. My father is interested in playing board games.

10. He enjoys watching football very much.

11. Because Minh was sick, she could not go to school.

12. We haven't seen her since 2001

a: Xét ΔBAH vuông tại A và ΔBDH vuông tại D có

BH chung

\(\widehat{ABH}=\widehat{DBH}\)

Do đó: ΔBAH=ΔBDH

Gọi quãng đg 3 xe chạy lần lượt là a,b,c (km)(a,b,c>0)

Vì vận tốc tỉ lệ với 3;4;5 nên quãng đường tỉ lệ với 5;4;3 \(a:b:c=5:4:3\Rightarrow\dfrac{a}{5}=\dfrac{b}{4}=\dfrac{c}{3}\) và \(a-c=20\left(km\right)\)

Áp dụng t/c dtsbn:

\(\dfrac{a}{5}=\dfrac{b}{4}=\dfrac{c}{3}=\dfrac{a-c}{5-3}=\dfrac{20}{2}=10\\ \Rightarrow\left\{{}\begin{matrix}a=50\\b=40\\c=30\end{matrix}\right.\)

Vậy ...