1. 选词填空

all of a sudden, come down, up and down, have yet to, in the open air, keep on

1. （1） The cold rain for hours last night.  
3. （2） To my surprise, he looked at the stranger .  
5. （3） He smoking during the meeting, which made me angry.  
7. （4） a shower came down, so that my skirt outside was all wet.  
9. （5） They had to sleep after the earthquake to keep safe.  
11. （6） I find out the truth.