1. 用所给词的适当形式填空。

1. （1） —Would you like to go shopping with us?

   —No, I am (real) busy these days.

3. （2） They often invite me (have) dinner on weekends.

5. （3） You should (delete) the useless news on your computer.

7. （4） People gathered (聚集) to watch the (open) of the box.

9. （5） I'm looking forward to (meet) my old friend, Jim, this Sunday.