Lily was talking to our teacher about examination, when suddenly Tom _______.
A．cut offB．cut outC．cut upD．cut in
D

試題分析：考查動(dòng)詞辨析：A. cut off切斷，B. cut out剪下，C. cut up切碎，D. cut in插話，句意：莉莉正在和老師談?wù)撽P(guān)于考試的事情，這是湯姆突然插話。所以選D。
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