－I think students should be allowed _____ homework with friends.
－I disagree. They talk instead of ________ homework.
A. do, doing
B. to do, to do
C. to do, doing
D. doing, to do
Ｉdidn’t go to bed _______ I finish my homework.
A. after B. when C. if D. until
The boys don’t know ___________.
A. how do they swim
B. how swim
C. they how swim
D. how to swim
— You didn’t use to play tennis, ______?
— Yes. I still like playing tennis now.
A. didn’t you
B. did you
C. weren’t you
D. were you
__ they were not rich, they tried their best to send their child to the best school.
A. However B. Because C. Even though D. So
Smoking is bad for your dad’s health.
You’d better ask him to ______.
A. give up it
B. give it up
C. take out it
D. take it out
