選用had better,himself,must,can,should,yourselves,had better not ,mustn't ,don't have to ,can't填空
1 your mother is getting better and better ,you _ worry about her.
2.We _ wash our hands before meals
3.There is air around us,though we _see it.
4.Mingming is very young,He can't look after _ very well.
5.What _I do next?You should stay at home and do nothing
6.Maybe you have a bad cold .You _ go to see a doctor.
7.I don't feel like eating today.
You _ go to school and have a rest at home.
8.We_ keep the windows open all the time.
9.Help _ .Jim and Mary.
10.please speak a little louder so that I _ hear you .