—What did our geography teacher say?—She told us that the earth _____ around the sun.
---- Let’s go fishing if it _______ this weekend. ---- But nobody knows if it ______.
I think these materials may be of ___________ to your study.
My father wants me to be a doctor _______an engineer,________I want to be an actor.
We may meet all kinds of difficulties in the future, but we should be confident enough to___________ any challenge.
— Our monitor Jack is good at all the subjects, but he never___________ . — What a modest student!