Câu hỏi: Chewing gum ………… in Sweden in 1993.

A. was invented

B. is invented

C. has been invented

D. invented

Câu 1: Tay Bac university ……. in Son la town for two years.

A. was built

B. is built

C. have been built

D. has been built

Câu 2: We’ve decided …………. married in the spring.

A. getting

B. to get

C. get

D. got

Câu 3:  They found it is impossible ……… their problems.

A. solve

B. to solve

C. solved

D. solving

Câu 4:  “The Wall” ….. when all the members were students.

A. founded

B. was founded

C. has been founded

D. have been founded

Câu 5: All students at Tay Bac university ……… uniforms on Monday.

A. are asked to wear

B. ask to wear

C. asked to wear

D. to asked wearing

Câu 6: She can’t talk to you now, she …………

A. study

B. is going to study

C. is studying

D. will studied