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

A. cry

B. are crying

C. have been crying

D. cries

Câu 1: Television is a prime source of home entertainment; ................, it is a cheap babysitter.

A. furthermore

B. therefore

C. accordingly

D. on the contrary

Câu 2: It ............... a lot last winter.

A. snows

B. has been snowing

C. snowed

D. snow

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

A. have known

B. know

C. knowing

D. was known

Câu 4: The old drainage pipelines must be maintained; ................, leakage will be unavoidable.

A. therefore

B. similarly 

C. on the contrary

D. otherwise

Câu 5: By next month, I ...................... at this company for a year.

A. will work

B. will be working

C. will have been working

D. am going to work

Câu 6: I ................. the house before you called.

A. leave

B. am leaving

C. had left

D. had been leaving