Câu hỏi: Babies ................ when they are hungry.

A. cry

B. are crying

C. have been crying

D. cries

Câu 1: We ....................... in the plane for hours when it finally, took off.

A. had been sitting

B. have sat

C. will be sitting

D. will sit

Câu 2: We .............. since 5:00.

A. talk

B. are talking

C. talking

D. have been talking

Câu 3: I .............. Michael for years.

A. have known

B. know

C. knowing

D. was known

Câu 4: The new project received a lot of financial assistance from the WTO; ..............., it could easilybe approved by the authority.

A. thus

B. on the other hand

C. on the contrary

D. inaddition

Câu 5: Before the police arrived, the robbers ..........................

A. run

B. had run

C. have run

D. have been running

Câu 6: Some people are using motorbikes for transportation; ....................., others are taking publicvehicles to get to their destination.

A. hence

B. otherwise

C. therefore

D. besides