第1个回答 2007-12-23
1.Please wash your hands before dinner.
2.I will wait for you until 7.
3.I will wait for you until mom comes back.
4.He will do homework after 7
5.He began to do homework after calling me
6.He has lived in Beijing since 1997
7.He has stayed in Beijing since his graduation in 1997
8.The Devil Fish is seen when everything is quiet
9.When it rained,We were playing on the playground