— Can you lend me the book Gone with the Wind?

— Sorry. I returned it to the library just now. Maybe it is still ____.

You are working too hard. You'd better keep a ________ between work and relaxation.

It is by no means clear      the president can do to end the strike.

When deeply absorbed in work, ________ he often was, he would forget all about eating or sleeping.

When you are done with the book, just give it to Lucy or Helen or __________.

Nothing is so easy as ________ parents to raise their expectations of their children too high.

Not until he retired from teaching three years ago       having a holiday abroad.

Don't handle the vase as if it ________made of steel.

One of our rules is that every student       wear school uniform while at school.

The new movie____________ to be one of the biggest money-makers of all time．