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