26．The student is asking his teacher ____ the sports meeting.

25．What's the weather ____ today?

24．My watch is very different ____ yours.

23．Thanks ____ asking me to your party.

22．I'm afraid he is ____ the cinema ____ the moment.

21．Eating too much isn't good ____ your health.

20．I think Mary is ____ duty today.

19．When did you arrive ____ the village?

18．Did you live ____ Beijing in 1997?

17．The eraser was passed ____ one student ____ another.