III

19. Because Peter was ill, he stayed at home yesterday

20.Don't make noise in class.

21. Although the Coast is a famous TV se series, I have...

22.- They weren't in Rio last summer.

     ? Were they in Rio last summer?

23.-He didn't buy a new house last month.

? Did he buy a new house last month?

III.

1.C.  2.C.    3.C.     4.B.   5.B.   6.A

7.D.    8.B

IV.

1. I have been three times to Ha Noi.

2. My brother is the tallest person in my family.

3.Have you ever eaten ice cream in winter.

4.Where did you play badminton yesterday.

V.

1. Nam likes watching television.

2. Mai is the most intelligent in my class.

3. Ho Chi Minh city is biggest city in Vietnam.

4.I was sick so I didn't go to... Yesterday.