Lab workers must wear protective ______.
A．clothB．dressC．clothingD．costume
C
此題考查詞義辨析。cloth指做衣服用的布料，不可數(shù)；dress尤指女子的連衣裙及某種特殊場(chǎng)合下穿著的服裝；clothing是衣服、服裝的總稱，集體名詞，不可數(shù)。作主語(yǔ)時(shí)，謂語(yǔ)用單數(shù)形式；costume指服裝、服裝式樣(尤指用于某時(shí)期、某團(tuán)體或某活動(dòng)的服飾)。
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