Câu hỏi: Helen had said goodbye to everybody in the class _____ she left for the hometown.

A. after

B. before

C. and

D. for

Câu 1: Last night I was invited ___ a formal get-together and I enjoyed myself a great deal.

A. to

B. at

C. for

D. about

Câu 2: I am sure he didn't break the plate ______ purpose.

A. in

B. at

C. for

D. on

Câu 3: I like to shower in the morning, but my roommate likes to shower ____ night.

A. at

B. on

C. in

D. with

Câu 4: She returned ____ China after spending much time abroad.

A. in

B. from

C. to

D. at

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

A. at

B. on

C. in

D. upon

Câu 6: We were very disappointed _____ the organization of the festival.

A. to

B. with

C. about

D. of