Last year he learned （ ） he had expected because he worked a lot harder.

He works too hard.That’s _____ is wrong with him.

After （ ） seemed to be an endless wait, it was finally his turn to have the interview.

They always give their vacant seats to （ ） comes first.

These three teachers vary_____their manners of teaching.

We didn’t finish the work in time. You _____ us since you were there.

（ ） the price, it is a thousand times worth it.

These tickets for the performance are （ ） until the end of the month．

Millions of Americans take vitamins and minerals, （ ） that these pills can help to prevent serious illnesses.

We’re sure that the environment in our city （ ） greatly through our work in the near future.

The Quality Control Staff is responsible _____ the quality of the products that come out of the factory.

Some cities have passed laws that allow coal and oil_____only if their sulfur content is low.