The energy from the sun and wind is very cheap and it will never .

In order to ______ a good knowledge of English, he gave up his job and went to study in an English school.[ ]

The twins are quite different. Sam is wild while Tom is quiet.—Yeah, Sam is ___________ than Tom.

There is somebody at the door. ________it be Tom— No, it _______ be him. It’s just sixo’clock. It’s too early.

She says that she’ll have to close the shop ________business improves.