1.  The coffee isn't strong enough to keep us awake.

2. Why did he fail his exam ?

3. He has short and dark hair.

4. What are you going to be in the future ?

5. You ought to practice speaking English every day.

6. Let's go to Vinh Nghiem Pagoda. 

How about go to Vinh Nghiem Pagoda ?

7. People used to travel on foot many years ago.

8. They are going to invite him for dinner tonight.

9. Nam is going to visit his grandparents next Sunday.

10. It's dangerous to put a knife into an electrical socket.

11. It's interesting to travel around the city.

12. You must stay in bed because you are ill.

13. Lan repaired the bike by herself.

14.  Why did they not go to the beach ?

15. The radio isn't big enough for he to put in his pocket.

Chúc thi tốt ._.

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1. The tea isn't strong enough to keep us awake. 
2. Why did he fail his exam? 
3. He has short and dark hair. 
4. What are you going to be in the future? 
5. You ought to practice speaking English every day. 
6. Let's go to Vinh Nghiem pagoda. 
How about going to Vinh Nghiem pagoda?
7. People used to travel on foot many years ago. 
8. They are going to invite him for dinner tonight. 
9. Nam is going to visit his grandparents next Sunday. 
10. It's dangerous to put a knife into an electrical socket. 
11. It's interesting to travel around the city. 
12. You must stay in bed because you are ill.
13. Lan repaired the bicycle on her own. 
14. Why didn't they go to the beach? 
15. The radio isn't small enough for him to put in his socket.