一些简单的英语题目 大家哇~~帮帮我辈```题目如下

楼上的，我觉得第一第二句应该是
Where is he (and what is he doing)?
Mary isn't singing in her room.

Where does he read?
Mary doesn't sing in her room.
Are the girls dancing at school?

-He's （reading in the library.）括号部分提问. What's he doing? 或 What is he doing?
-Mary's singing in her room.改否定 Mary isn't singing in her room.
-Thr girls are dancing at school.改一般疑问
Are the girls dancing at school?