The Eiffel Tower________by the French engineer Alexandre Gustave Eiffel for the Paris Exposition(巴黎博览会)of 1889.
—Whose shirt is this?—It ______ be Li Lei’s. It is too big for him.
Could you tell me ______ the bookshop is?
I don’t know ______ he will come tomorrow. ______ he comes , I’ll tell you.
He was afraid ______ make friends with anyone.
If you think you are a ______, you might always be ______.