The real reason for the fire _______ a burning cigarette end.
A．starts withB．leads toC．focuses onD．lies in
A

試題分析：考查動(dòng)詞短語辨析。句意：火災(zāi)的真實(shí)原因是一個(gè)煙頭引起的。A以……為開始；B導(dǎo)致；C專注于；D在于。故選A。
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