— 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
Pudong International Airport is one of_______ airports in the world.
Don’t jump to a conclusion! Let’s _______ the problem first.
They were all very tired,but ________of them took a test.
I was born _______ March,1999.
-There is someone knocking at the door.- It ______ be Jimmy, he has gone to ShangHai .