单选题 Man is most likely to be stricken with a cold if ______.

A、 he often rubs his eyes or nose
B、 he fails to expose the cold viruses to air
C、 he visits his friend in a warm room
D、 he shakes hands with a cold-sufferer

【正确答案】 D

【答案解析】[精析] 题干意为“如果…很容易得感冒。”该题为细节题。由第二段中“Numerous studies have shown that the overwhelming majority of colds are‘caught’by hand contact．”可以看出，研究表明很多感冒是由手接触引起得。