The silence of the library is sometimes broken by a sudden cough or the sound of pages______.
I invited Joe and Linda to dinner,but ________ of them came.
More and more people are willing to ________ part of their incomes to school children in the povertystricken areas.
Although he has not gone to college,he shouldn't ________ studying for his degrees.
The reason ________ he was late for the meeting is ________ his car broke down on the road.
________Beijing you see today is quite ________ different city from what it used to be.