从题中所给的 A、B、C、D四个选项中选出能填入空白处的正确选项。

Winter is coming. These days the weather is getting1. Many people worry2getting the flu. How do we prevent ourselves from it? Here is some advice given by Dr. Li, a doctor from the People's Hospital.

First, it's a good way to wash hands before eating meals3after playing. Second, we must4our room clean. We should often open the windows and keep the air5. We also need to drink plenty of (足够的) water. Next, we must change6clothes often. And then, we'd better keep away from7places. Finally, don't forget to exercise often to8us up.

In the end, Dr. Li said," Don't9afraid of getting the flu. If you have a fever or cough terri‐ bly, you should see a doctor in time and take10medicine. "