Câu hỏi: She is tired because she ------------- all day.

A. is studied

B.  has been studying 

C. had been studying

D. studied

Câu 1: When I got to the office, I ----------- that I had forgot to lock the door.

A. realized

B. had realized

C. realize

D. have realized

Câu 2: They ------------ to the theatre twice so far this month.

A. are going

B. go

C. went

D. have been

Câu 3: As the sun ------------ I decided to go out.

A. shines

B. has shone

C. shine

D. was shining

Câu 4: “What a lovely boat!” “I ……………half a year building this boat.”

A. spend

B. spent

C. spending

D. have spent

Câu 5: We are too late. The plane …………… off ten minutes ago.

A. has taken

B. took

C. had taken

D. was taken

Câu 6:  I’m sorry. I don’t understand what -----------------.

A. you say

B. you're saying

C. you will say

D. you would say