Staying in hospital and taking special medicines ________ drug users an opportunity to stay away from drugs, which is________ the key to breaking the addiction to drugs lies

How do you like the movie Kung Fu Panda？——It’s so touching I have never have seen ____ one

The news that he failed in the exam _______ his unhappiness this morning

I know there are many people there________speak English.

Almost _______ of the students in this class wear glasses, that is, _______ of them.