一
1 at -> for ( wait for)
2 are -> is ( child
二
1 don't wash
2 will wash
三
1 for
2 for
3 to
4 to
5 at
四
1 What are you going to do?
2 What are they doing?
3 He will turn on the radio./ He is going to turn on the radio.
五
1 Don't put the flowers on the desk.
2 What is he doing after class?