— Do you know ?
— Next Friday.
A. when will he come back
B. when he came back
C. when did he come back
D. when he will come back
This famous tower more than 300 years ago.
A. build B. builds
C. built D. was built
—What did you do for your mom on her birthday?
—I her a birthday cake.
A. buy B. bought
C. will buy D. have bought
Our teacher often tells us enough sleep every day.
A. have B. had C. to have D. having
I in this school for three years.
A. have studied B. will study
C. am studying D. studied
Hurry up, you will be late for the meeting.
A. so B. or C. and D. but