用所给词的适当形式填空。

1. If you don't work hard, you can't be a computer _____ (program).

2. I think it's a good idea to go _____ (swim) in the rivers and lakes in summer.

3. I want to work for _____ (me) when I am rich enough.

4. The kids _____ (not) go to school now if it is raining too hard tomorrow.

5. She had _____ (little) money to spend this time, because her father lost his job two weeks ago.

ほら、たくさんの小鳥が空（）飛んでいますね。

A.で

B.に

C.を

D.と