Bài 6:

1.we played tennis for 2 years

2.mai goes to the library today

3.my sister moves to a new house near her boyfriend's flat

4.his teacher hasn't explained this lesson yet

5.this is the best film i've ever seen

6.minh has just left office for 2 hours

7.did they write a report since last monday?

Bài 7:

1,5,8,10.for

2,3,4,6,7,9.since

Mình ko chắc là đúng hết đâu nha

=>

6/

1. We have played tennis for 2 years.

2. Mai has gone to the library today.

3. My sister has moved to a new house near her boyfriend's flat.

4. His teacher hasn't explained this lesson yet.

5. This is the best film I have ever watched.

6. Minh has just left the office for 2 hours.

7. Have they written a report since last Monday?

7/

1. for

2. since 

3. since

4. since

5. for

6. since

7. since

8. for 

9. since

10. for