选用con,could,may,must,shall,will,would,con’t,mustn’t,needn’t,

选用con,could,may,must,shall,will,would,con’t,mustn’t,needn’t,have to填空.急
选用con,could,may,must,shall,will,would,con’t,mustn’t,needn’t,have to填空.
1.There is air around us,though we________see it.
2.You mother is getting better and beter.You_______worry about her.
3.You________play footdell in the busy steet.
4.–“--------it be thus?”—“Yes.It butrus indeed.”
5.Tom_______come to the party tonight,but I’m not sure.
6._________you please fetch some water for me?
7.Young trsse_____________be plantsd in spring.