Shanghai is one of _______ in the world .
A. more big city B. the biggest city
C. the biggest cities D. the most big city
—Do you know when back?
—I don’t know. But if he back, I will call you.
A. will he come, comes
B. he will come, comes
C. he comes, will come
I won’t go to tomorrow’s party________I am invited．
A．if B．unless C．when
________you read it，you can’t imagine how moving the story is．
A．Unless B．Because C．Although
The girl is afraid to dance in public because she thinks others may________her．
A．laugh at B．wait for
C．hear of D．agree with
Betty will ring me up as soon as she ________ in Shanghai.
A. arrive B. arrives
C. arrived D. will arrive
