A feather falls slower than a stone only because the air holds the feather back more than it ______ the stone.
A．doesB．holdsC．willD．is
A
英語在使用時盡量避免重復(fù)。在進(jìn)行對比、比較或說明兩組事物相同時，用do來代替前面的動詞（詞組）�？涨暗膇t 指代the air, 空上應(yīng)為holds back, 但為了避免重復(fù)，用do 的單三形式does替代上文所用的動詞短語。
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