根据对话内容，从方框内选出能填入空白处的最佳选项。其中有两项为多余选项。

A: What's the matter?

B: .

A: How long have you been like this?

B: .

A: I see. Your problem is probably caused by the bad weather.

B: . The hazy, smoggy (雾霾) weather

makes me feel uncomfortable.

A: Yes, the weather has been heavily polluted for days. You know, when the air particles reach the level of PM2.5 , it can lead to heart, brain and respiratory（呼吸道） diseases.

B: It sounds terrible. .

A: Well, you'd better not go out unless you have to. Take some medicine, drink a lot of water and you'll be better.

B: .

A. We should do something to protect the environment. B. I have a sore throat. C. Do you have a cold? D. What can I do then? E. Since the weather got worse. F. I will. Thanks for your suggestions. G. I think so.