1. (2017·绍兴) 用方框中所给单词的适当形式填空，每词仅用一次（每空一词）

speech      smooth      our      until       divide

1. （1） I didn't learn to paint  I was forty.

3. （2） The students were  into four groups before doing experiments.

5. （3） James looked tired, for he listened to three  this morning.

7. （4） I'll lead you to your room.  is the one next door.

9. （5） There is no wind and the water is as  as glass.