--- Tom, where is your father? --- I’m not sure. He_______ in his office.
We could see nothing because the lights suddenly ______.
The mountain was ______ steep ______ few people in our city reached the top.
The war was over about three months ago, ______ the American soldiers in Iraq are still having a lot of trouble to deal with.
—Which sweater do you prefer, the yellow one or the pink one? —______. I like a light blue one.
Jim has made many friends since he ______ to China.