2. 外语
  3. Some people’s ears produce wax like busy little bees. This can be a problem even though earwax(耳垢)appears to【S1】______an importa

Some people’s ears produce wax like busy little bees. This can be a problem even though earwax(耳垢)appears to【S1】______an importa

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问题      Some people’s ears produce wax like busy little bees. This can be a problem even though earwax(耳垢)appears to【S1】______an important purpose. Experts say it【S2】______and cleans the ear. It【S3】______dirt and other matter and keeps insects out. Doctors think it might also help protect against【S4】______. And the waxy oil keeps ears from getting too dry.     So earwax is good. It even has a medical name: cerumen(耵聍). There are two kinds. Most people of European or African ancestry have the "wet" kind: thick and【S5】______. East Asians commonly have "dry" earwax.     But you can have too much of a good thing. The glands(耳道)in the ear canal that produce the wax make too much in some people Earwax is normally【S6】______; it falls out of the ear or gets washed away. But extra wax can harden and form a【S7】______that interferes with sound waves and reduces【S8】______.     People can also cause a blockage when they try to【S9】______out their ears, but only push the wax deeper inside. Earwax removal is sometimes necessary but you have to use a【S10】______method or you could do a lot of damage.

A)sticky            B)hard           C)expelled            D)protects
E)listening         F)clean          G)heating             H)safe
I)blockage          J)made           K)infections          L)partly
M)serve             N)traps          O)slight
【S5】
选项
答案A
解析 此处并列结构用形容词。根据句意，欧洲或者非洲血统的人耳垢是湿润型的，因此不会很坚硬，故不选hard而选sticky。
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大学英语四级

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