There are ________ bears on the earth because they have ____________ space on it．

How long do you suppose it is ___________ he arrivedthere

It is quite impossible forpeople to dowork in a day.

The paper says Iron Man 3 is on this evening. Let’sgo and see it. — But I ________it.

A study shows that good habits play a very important _________ in children’s education.—I think so.