— Susan, would you like to go hiking with us this afternoon?— I'd love to, but I study for a test.A. may B. have to C. can
It’s________to play on the road.You’d better play in a________place.
There are so many kinds of pens in the shop that I can’t decide________.
—Excuse me,could you tell me________a book about science?—Sure.They are on the second floor.
A________day!Don’t you want to go out for a walk with us?
I hear it’s a________experience to visit the caves and many people go there every day.