用适当的介词填空

1.I often watch TV          Saturday evenings.

2. In highrises people go up and down         a lift.

3. Most students go home          school. But some stay_________ school.

4.____________February there are only 28 or 29 days. It has the fewest days ­­______the twelve months

5. It is a long way_____________ China and the U.S.

6. Whales can stay______________ the water_____________ a long time. They come up only_____________ air and their noses are____________ the top of their heads.