What we learn today in school will ______ whether we can meet our challenges in the future.

It was at 10 o’clock last night ________ the visitors finally arrived at Zunyi Airport.

mpany used 50 percent of the raw materials, therest of which __________ sent to other cities to help the factories there.

When the policeman stopped us, we all looked questioningly at him, ?

I _______ Linda. This _____ my pen.