7. He'd better wear glove to protect his hands.
8. Ho Chi Minh City is the biggest city in Vietnam.
9. I think he is good at speaking Japanese.
10. if we don't try to save our sources of energy , they will soon end.
11.You need to finifh your assignment this evening.
12.She is interested in speaking English.
13 You should revise your lesson carefully before the exam .
14 It's very important to keep the environment clean.