用所给词的适当形式填空。

1. ______ (help) us learn more about plants, we planted some seeds.

2. I'm sorry to keep you ______ (wait) for so long.

3. — Don't you forget ______ (meet) me 3 years ago here?

    — Sorry, I can't remember.

4. April 1st is April ______ (fool) Day.

5. Rose is ______ (pretty) girl in the school.

在所有的重整反应中，（）反应速度最快，而且能充分转化成芳烃，是重整的最基本反应，此反应为高吸热反应。