Though ______ to see us, the professor gave us a warm welcome.

There’s no doubt2013will bring more change when the world economy is still unclear.

Did the actor live alone in the house—Yes. He has a wife and two children. But ____ of them live with him.

. We have finally finished it! When ______the job if we had started it a week earlier

下列各句中，表达得体的一句是（ ）