练习：
1.Accordingtothe essay，you may have a cold because
A)the weather is too cold.
B)the spread of rhinoviruses gets people infected.
C)another person’s coughing passes the cold to you
D)you wash your hands too often.
2.The best way to keep yourself from getting colds is
A)to keep yourself clean.
B)to use a disinfectant soap.
C)to take two aspirins every day.
D)to drink lots of water.
3.Children have more colds because
A)they are usually infected about eight times each year.
B)they are not immune to many cold viruses yet.
C)they never wash their hands So that their thumbnails are dirty.
D)they don’t 1ike eating lemon.
4.When you are having a cold，
A)it is always the same kind of cold that you had last time.
B)it may be the same kind of cold that you had last time.
C)it is certainly not the same kind of cold that you had last time.
D)it is probably not the same kind of cold that you had last time.
5.When one is having a cold， he may often have a11 the following symptoms EXCEPT
A)coughing.
B)having a sore throat.
C)having a runny nose.
D)having a stomachache.
参考答案：
1.B 第一段虽然提到了感冒常发生于冬天，但紧接下去说得很清楚：受凉并不导致感冒，所以A不是正确答案。文章第四段第一句说得明白：感冒通常是与感冒的人身体直接接触而传染的，而不是由打喷嚏或咳嗽传染的，所以C项也不是正确答案。至于D更是错误。答案B与第一段第三句的意义相吻合，因此是正确答案。
2.A 第五段的第一句话“Hygiene is your best defense”意思是“卫生是你的最佳防御”，与A项相吻合，因此A项是正确答案。同一段中提到的用消毒肥皂洗手，虽然也是保持卫生的手段之一，但仅是一个具体措施，不是全部措施，所以B项不是正确答案。C项提到的服阿司匹林是治感冒的手段之一，而非预防手段(况且没有说到“一天服两片”！)D项提到的多喝水在文中也指治疗手段，所以c和D都不是正确答案。
3.B 第二段中提到儿童平均一年得八次感冒，这是一个统计数据而不是儿童得感冒的原因；文中并没有说“儿童从不洗手”；文中也没有说“儿童不喜欢吃柠檬”；所以A、C、D都不对。B项与第二段最后一句意思一样，是正确答案。
4.C 第三段提到有150种感冒病毒，而人们绝不会被同一种病毒侵害两次，因为得了一次感冒后对相应的病毒就获得了免疫力，所以只有C项才符合第三段的内容。
5.D 本题谈的是文中提及的感冒症状。文中并没有提到得了感冒就胃疼，实际上文中根本就没有“stomachache”这个词或相关的字眼，所以D项是正确答案。