用所给单词的适当形式填空。

1. He helps us a lot, he is a __________ (help) student.

2. This film is very boring I felt _________ (bore).

3. I am a __________ (read) of yours, I read your every article in the newspaper.

4. He is very clever, because he always answers the questions _________ (correct).

5. I am _________ (will) to teach these children.

对于往复式天然气压缩机，要留有适当（），余隙太小则（），余隙太大则（）。