It is a good plan in theory, but it _____ to be seen whether it works in practice.

How is he now? Is he slowly ____?

_____ the watch and see if you can find out what’s wrong with it.

—You look upset. What’s the matter?
—I had my proposal 　　　    again.

I really 　　　     you for your way of making decisions.  

The couple had quarreled all time before they 　　　     their engagement

Can you tell the _____ difference between the words “require” and “ request”? I sometimes get puzzled by their meanings.

— These days I can only sleep for four or five hours at night as I’m too busy with my research work..
— If you keep going on like that, you are sure to ______ sooner or later.

A good teacher must ______ to his students the importance of a proper learning method.

I can’t _________ his rudeness anymore, so we began to quarrel.