根据句意完成句子。

1.  ______is more important than wealth (财富).

2.  ______ eye exercise is good for your eyes.

3.  Because I have lots of good h______ , so my l______ is very healthy.

4.  ______it was snowing, it wasn't cold.

5.  He is a lucky reporter.  Because he i______ Chairman Hu yesterday.

在机械制图中，外螺纹的牙顶用（）线表示。