【題目】—What happened to Jim? —He fell ______ the bike _______ a snowy morning.

A.off; in B.down; at C.off; on D.down; on

【答案】C

【解析】本題考查介詞用法，fall off sth=fall down from sth“從……上摔下來”；on a+形容詞 morning,“在一個……的早上”。

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