1. 用方框中所给单词的适当形式填空。

develop   proper   connect   power   introduce

1. （1） Mr. Smith is  , and his ideas always influence others.
3. （2） With the  of modern science, more things are invented.
5. （3） He is giving a talk about the  of the new machines.
7. （4） How long did the  of the telephone take?
9. （5） The television doesn't work . Can you help me?