题目内容
as soon as,until,while,since,before
1. You should wash your hands meals.
2. my mother was cooking,I was watching TV.
3.Americans have celebrated Independence Day 1777.
4.It was very warm in the room. The man took off his coat he walked into the room.
5.Every night,the wife does not have dinner her husband comes back.
1. before 2. While 3. since 4. as soon as 5. until
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