从方框中选择合适的选项补全对话。
A：What were you doing at eight yesterday evening?
B：I was helping my mom clean the floor._________
A：I was using the Internet.   
B：________You look tired.
A：No，I went to bed early，but I had a terrible dream at night.
B：Really？That's too bad._______
A：In my dream，I was working on a math test，but I couldn't answer any of the questions._______
B：What happened then?
A：I woke up and felt very tired.      
B：_______

A．Did you use it late?       B．I was very worried. C．What a bad night!    D．What did you dream of?  E．How about you?