7, D

$⇒$ Used to + V(inf): từng làm gì đó

8, A

$⇒$ S + have/has not + Vpp + since + mốc thời gian = S + last+ V(past) + in + mốc thời gian.

9, B

$⇒$ S + start + to-inf + at + mốc thời gian = S + have/has + Vpp + since  + mốc thời gian

10, C

$⇒$ Cấu trúc câu điều ước diễn tả một điều ước không có thật ở hiện tại:

S + wish(es) + S + V(past) + (O)

7. Mary usually went to school late

A. Mary used to went to school late.

B. Mary usually used to go to school late.

C. Mary used to usually go to school late.

D. Mary used to go to school late

`->` Áp dụng cấu trúc :

`->` used to V ( nguyên mẫu) O

8 I have not visited Uncle Tri since 2005

A. I last visited Uncle Tri in 2005.

B. I have last visited Uncle Tri since 2005.

C. I last had visited Uncle Tri since 2005.

D. I last visit Uncle Tri since 2005.

`->`Áp dụng cấu trúc :

`->` S +last+V+ O+ In+mốc thời gian

9. We started to study Math at seven o’clock.

A. We have studied Math at seven o’clock.

B. We have studied Math since seven o’clock.

C. We have started to study Math at seven o’clock.

D. We have started to study Math since seven o’clock.

10. Mai doesn’t know a lot of students in her class.

`->` Áp dụng cấu trúc thì hiện tại hoàn thành:

`->` S +have/has +Vpp 

A. Mai wishes she will know a lot of students in her class. ​​​​​​​

B. Mai wishes she knows a lot of students in her class

C. Mai wishes she knew a lot of students in her class.

D. Mai wishes she didn’t know a lot of students in her class.

`->` Áp dụng câu trúc câu ước

`->` S + wish {es}(quá khứ) +V +O