1.C on
2.C differences
3.B as
4.on
5.has the best
6.A sometimes
7.C to help
8.A shall we
9.always early
10.is going /is over
11.A looked over
12.B less more
13.someting改为anything
14.needn't 改为doesn't need
15.A anything important
16.C don’t
17.swims
18.A Eat
19.B problem
20.a little
21.at times
22.C is having
23.forget改为forgot
24.C asking for on day’s leave
25.B relaxed