Afeatherfallsslowerthanastoneonlybecausetheairholdsthe...

問題詳情：

 A feather falls slower than a stone only because the air holds the feather back more than it ______ the stone.

A. does            B. holds            C. will             D. is

【回答】

A

知識點：動詞時態與語態

題型：選擇題