1. While she was on vacation, she buys gifts for her family.

A. While.

B. On vacation.

C. Buys.

D. Gifts

→ Vế trước dùng thì Quá khứ đơn

→ Mà lại có từ While ( trong khi )

→ Vế sau phải dùng thì Quá khứ đơn

→ Sửa lại : Bought

2. In spite of its small size, these cameras take very good pictures.

A. In spite of.

B. Its.

C. Cameras.

D. Good pictures

→ Sửa lại : Their

→ Vế sau có These cameras là số nhiều

3. I would rather you not eat in the office.

A. Would

B. Rather

C. Not eat

D. The

→ Sửa lại : Didn't eat

→ Cấu trúc : Would rather sb did sth : Muốn ai làm gì

1. While she was on vacation, she buys gifts for her family.
A. While.
B. On vacation.
C. Buys. => was buying
D. Gifts
2. In spite of its small size, these cameras take very good pictures.
A. In spite of. =>despite
B. Its.
C. Cameras.
D. Good pictures
3. I would rather you not eat in the office.
A. Would.
B. Rather.
C. Not eat  => didn't eat 
D. The.