问题补充：
How to keep healthy? Its easy for us to catch a cold in winter and spring because the weather changes a lot in spring and it is too cold in winter. But if we take care in our life, all of us can keep healthy without any cold.
【小题1】This will stop germs（细菌）passing from one person to another. When you finish your work or before you eat, youd better wash your hands.
【小题2】Use a tissue(纸巾), and then throw it into dustbins at once. When others around you are coughing, I advise you to turn your head away from the people so that their viruses won reach you.
Get more fresh air. Germs like staying around in dry and warm rooms. 【小题3】Don stay too long in the places with too many people.
If flu is going round house or school, you should try to stay away from those who are iIl.【小题4】
Boil your toothbrush for about a minute. This kills germs. 【小题5】If you have used the toothbrush for three months or so, throw it away and buy a new one.
A. Have a shower everyday
B. Wash your hands often
C. Don use your hands when coughing
D. Don go out often when you are coughing
E. Besides, don use the same toothbrush too long
F. In this way, you won get sick for these people
G. So youd better stay in the places with more fresh air
B
答案：
(答案→)B
解析：
【小题1】根据本段最后一句youd better wash your hands
【小题2】根据下文Use a tissue可知是要我们咳嗽时不要用手。
【小题3】根据本段Get more fresh air。
【小题4】根据前一句you should try to stay away from those who are iIl可知F与之相配。
【小题5】根据后一句If you have used the toothbrush for three months可知一把牙刷不要用太久。
