下列句子中每个句子都有一处错误,指出错误所在,并改过来.
1.A:What is they doing?
B:They playing football.
2.A:What’s time is it?
B:It’s three clock.
3.He’s danceing.
4.A:What is he doing.
B:He’s puting his book.
5.A:What she doing?
B:She is drawwing.