用所给词的适当形式填空。

1. She           (provide) her father with all the food and money he wanted.

2. The film I saw yesterday was very            (excite).

3. I'd like to hear your _         (suggestion)for ways of raising money.

4. Watching television can be very              (educated).

5. I can afford it, because it's           (expensive).

组成水稻细胞的最基本元素是（）

A.C

B.C、H、O

C.C、H、O、N

D.C、H、O、N、P、S