6.

1 Mai asked to call her at 6 o'clock the next morning.

2 Lan asked me if I was interested in that Language Center.

3 Mrs Chi said they would spend their holiday in Da Lat the next month.

4 The man asked Mr Linh what his son wanted to learn.

5 Hoa said we had to come today.

7.

1 Vinh is always forgets her homework.

2 Do you mind helping me put the chairs away?

3 I'd rather not  make any noise.

4 I have never used better computer before.

5 It's ages since he last chatted with his classmates.

6 The last time we saw her was when we left school.

7 My brother enjoys walking in the rain.

8 It's very important to keep the environment clean.

9 Minh has collected stamps since 2000.

10 How about meeting inside the center,at the cafe' corner?