1. 用方框中所给单词的适当形式填空。

convenience   polite   help   know   rule

1. （1） I decided to meet him in person because he soundedover the phone.
3. （2） You can go to the movie in my car. It'sfor you.
5. （3） Farmers were made to work day and night by thein the old days.
7. （4） Hangzhou is famous for West Lake. It's also widely for its tea.
9. （5） —Which invention is the most?

   —It's hard to say.