Câu hỏi: John F. Kenedy was the first President to be born ____ the twentieth century.

A. in

B. on

C. at

D. up

Câu 1: There must be _______ least one vowel in every English word.

A. at

B. on

C. in

D. upon

Câu 2: They came to visit us _____ my birthday.

A. at

B. on

C. to

D. of

Câu 3: Helen had said goodbye to everybody in the class _____ she left for the hometown.

A. after

B. before

C. and

D. for

Câu 4: We are her to provide you _____ the best service possible.

A. of

B. with

C. to

D. for

Câu 5: We were all fascinated ________ the things we saw.

A. on

B. in

C. by

D. for

Câu 6: Thank you very much _____ what you have done for me.

A. of

B. up

C. for

D. about