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: 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: I .............. Michael for years.

A. have known

B. know

C. knowing

D. was known

Câu 3: Louise was listening to the radio while she .................. the house.

A. is cleaning

B. was cleaning

C. had cleaned

D. will dean

Câu 4: We always...................... a present to Elsa on her birthday.

A. are taking

B. taking

C. take

D. are taken

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: By the time this movie is over, we ................... this entire bag of popcorn.

A. will have eaten

B. are eating

C. are going to be eating

D. will be eaten