I sometimes think that all his supposed mistakes are made ______ just to make me angry.
Excuse me,sir. Can you ________me to the post office?
In our class,when the bell rang and the teacher closed his book,it was a ________for everyone to stand up.
Following ShenzhouⅧ,two more mission space craft ________to join with Tiangong-1 before the end of 2012.
It's said that an American starts a speech with a joke,________a Japanese seldom.
________their timely help,we overcame the difficulties at last.