If an airplane blows up ______ . ()
（A）it might have been carrying a plastic bomb
（B）people who check baggage would lose their jobs
（C）people who check bags would be arrested
（D）the government will build a new machine
参考答案
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（A）it might have been carrying a plastic bomb
（B）people who check baggage would lose their jobs
（C）people who check bags would be arrested
（D）the government will build a new machine
