Câu hỏi: I .............. Michael for years.

A. have known

B. know

C. knowing

D. was known

Câu 1: The Wagners ................ to Florida two years ago.

A. moved

B. had been moving

C. move

D. will move

Câu 2: Kevin can’t talk on the phone because he .............. dinner right now.

A. is eating

B. eats

C. has eaten

D. has been eating

Câu 3: I don't want to go outside today because it ....................

A. rain

B. rains

C. is raining

D. is rain

Câu 4: 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 5: The old drainage pipelines must be maintained; ................, leakage will be unavoidable.

A. therefore

B. similarly 

C. on the contrary

D. otherwise

Câu 6: Mr. and Mrs. Wilson .............. some disputes with their neighbors.

A. having

B. have been having

C. have having

D. have been had