Câu hỏi: We .............. since 5:00.

A. talk

B. are talking

C. talking

D. have been talking

Câu 1: I .............. Michael for years.

A. have known

B. know

C. knowing

D. was known

Câu 2: The store ..................... two sales so far this year.

A. is having

B. has been having

C. has

D. has had

Câu 3: 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 4: The old drainage pipelines must be maintained; ................, leakage will be unavoidable.

A. therefore

B. similarly 

C. on the contrary

D. otherwise

Câu 5: I ................. the house before you called.

A. leave

B. am leaving

C. had left

D. had been leaving

Câu 6: The Smiths are eating less and exercising more; ..............., they can keep their weight down and stay in shape.

A. Consequently

B. also

C. nevertheless

D. otherwise