1. 根据句意和汉语提示，用正确的单词填空。

1. （1） I can't decide (是否) or not I should accept the invitation.

3. （2） The rule (要求) everyone to wear formal clothes to the meeting.

5. （3） We should put our (信任) in our parents and friends.

7. （4） Could you leave me in (安静)? You know, I've got lots of work to do.