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

A. at

B. on

C. in

D. upon

Câu 1: The price of electricity is going up _____ August.

A. in

B. on

C. at

D. of

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

A. in

B. at

C. for

D. on

Câu 3: John F. Kenedy was the first President to be born ____ the twentieth century.

A. in

B. on

C. at

D. up

Câu 4: Please put your stuff away to make room ______ the new computer.

A. from

B. upon

C. about

D. for

Câu 5: This book is based _____ part on fact.

A. in

B. upon

C. at

D. on

Câu 6: The children are really excited _____ their summer vacation.

A. on

B. of

C. to

D. about