1. 选词填空

not open, plan, understand, give, be

1. （1） They a sightseeing trip last summer holiday.
3. （2） Please be quiet. Mr Smith a talk on American history.
5. （3） I hope you what I do for you some day.
7. （4） There an English party at our school tomorrow, isn't there?
9. （5） I won't go to the library today because it on Sunday.