1. 用所给词的适当形式填空。

1. （1） It's time (say) Goodbye, but none of us want to leave.
   

3. （2） Ever since，I (make) so many good friends.

5. （3） Good evening, ladies and （gentleman）. Please listen to me carefully.

7. （4） The teacher encouraged me (not give) up.

9. （5） Don't be afraid of (make) mistakes.