Câu hỏi: They came to visit us _____ my birthday.

A. at

B. on

C. to

D. of

Câu 1: She'll come home ______ April.

A. on

B. in

C. at

D. for

Câu 2: Did you have a good time _____ Christmas?

A. at

B. in

C. for

D. on

Câu 3: We are her to provide you _____ the best service possible.

A. of

B. with

C. to

D. for

Câu 4: The police blamed the mother____ neglecting her child.

A. to

B. for

C. with

D. of

Câu 5: There must be _______ least one vowel in every English word.

A. at

B. on

C. in

D. upon

Câu 6: The government is trying to make the country safe _____ terrorist attacks.

A. from

B. of

C. at

D. for