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
— What was your brother like when he was young?
— He _______ be quiet, but now he’s very outgoing.
A. was used to
B. used to
C. used by
D. was used for
— What do you think of Beijing?
— Wonderful. It ________ changed a lot in the last few years.
A. have B. has C. is D. was
