I hear a number of workers in the factory_____out of work.__Yes, and the number _____quite huge.
Some people fear that ________ air pollution may bring about changes in _______ weather around the world.
It was _____ he came back from Africa that year _________ he met the girl he would like to marry.
The way the guests ___ in the hotel influenced their evaluation of the service.
A good friend of mine from I was born showed up at my home just before I left for Beijing.
—Ann is in hospital.— Oh, really? I __ __ know. I __ __ go and visit her.