dài quá ờ...

1 C

2 A

3 A

4 A

5 D

I

1 B

2 D

3 A

4 B

5 D

6 D

7 C

8 B

9 A

10 C

II

1 knew

2 didn't play

3 to get

4 write

5 didn't use to swim

III

1 D

2 A

3 B

4 D

4 B

1 The floor is cleaned by me everyday

2 The trees are watered by Nga in the morning

3 The children are often given some gifts on Christmas day

4 He isn't told what to do

6 The floor was cleaned 2 hours ago

7 The trees were often watered in the morning by Nga last year

8 The children are often given some gifts on Christmas day

9 He wasn't told what to do

11 The floor will be swept by me

12 The trees used to be watered by Nga in the morning 

13 The children should be presented some gifts on Christmas Day

14 He can't be taken to the cinema

15 You can't be helped with your homework

2. You will not be given anything if you don't study hard.

3. Nam was awarded a gold medal in the chess tournament last week.

4. My car was repaired yesterday.

5. I wish Nam had not been punished by our teacher.

6. A new hospital will be built in my village next year.

7. Jean cloth was made completely from cotton in the 18th century.

8. His dog is called Tony.

9. The boy was made to clean the window.

10. A new car was being washed when I came.

1F

2T

3T

4NG

5NG

6T

7NG

Tóm tắt
s = 32 km
s₁ = 4km
t₂ = 0,5 giờ
a) s₂ = ? km
b) v₂ = ? km/h
                             Giải
a) Quãng đường người đó đi xe máy là:
         s₂ = s-s₁ = 32-4=28 (km)
b) Vận tốc xe máy là:
         v₂ = s₂/t₂ = 28/0,5 = 14 (km/h)
Vậy...