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Lab workers must wear protective ______.
A.clothB.dressC.clothingD.costume
C
此题考查词义辨析。cloth指做衣服用的布料,不可数;dress尤指女子的连衣裙及某种特殊场合下穿着的服装;clothing是衣服、服装的总称,集体名词,不可数。作主语时,谓语用单数形式;costume指服装、服装式样(尤指用于某时期、某团体或某活动的服饰)。
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