Câu hỏi: 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 1: 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

Câu 2: We .............. to the baseball game when it started to rain.

A. are driving

B. drives

C. driven

D. were driving

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

A. have known

B. know

C. knowing

D. was known

Câu 4: We .............. since 5:00.

A. talk

B. are talking

C. talking

D. have been talking

Câu 5: It ............... a lot last winter.

A. snows

B. has been snowing

C. snowed

D. snow

Câu 6: Before the police arrived, the robbers ..........................

A. run

B. had run

C. have run

D. have been running