Not until they left school ______ how much their teachers loved them and helped them.
Many lifestyle patterns do such_______ great harm to health that they actually speed up_______ weakening of the human body.
We are going to talk about the problem _____ at the last meeting.
If this dictionary is not yours, _____ can it be?
It's no longer a question now _____ man can land on the moon.
—Do you know where the manager lives? —Yeah, but I have to _____ the telephone book for his address.