从方框中选择正确的句子补全以下对话．

Son：Mom，I'm not feeling well．

Mom：Oh，dear．（46） 　　

Son：My head hurts a lot．I think I need to see a doctor．

Mom：（47） 　　

Son：Since early this morning．

Mom：（48） 　　

Maybe you have a fever．

Son：Yes，I have．But it's OK．

Mom：（49） 　　

Son：I studied for the final exam till midnight．

Mom：I know．I think you didn't sleep well．

Son：Mom，I think you are right．（50） 　　

Mom：Of course．Don't stay up tonight．You can go to bed as soon as you finish your homework

A．What did you do yesterday？ B．Could I go to bed early tonight？ C．How long have you been like this？ D．What's wrong？ E．Have you taken your temperature？