I have kept that portrait _____ I can see it every day, as it always reminds me of my university days in London.
The old teacher lay wide awake on his bed, ___________ all the problems he had to deal with the next day.
I am one of the students who _________ English well in my class but he is the only one of us __________ maths well.
—I had been working till 4 a. m. to prepare a report for my boss.—____________you look very tired.
The USA and some other countries helped the rebels in Libya ____________ their promise to support democracy (民主) and fair trade.
According to the statistics,young drivers are more ________to have accidents than older drivers.