Only when class began ______that he had left his book at home．

Are these your books— No, _____ aren’t. _____ books are in the bag.

________is impossible to learn a foreign language well in such a short time.Rome was not built in one day.[ ]

The headmaster wanted the new classroom building to be ______ as soon as possible . [ ]

May I _____ your bike—Sure. But please give it back to me thisafternoon.