Onlywhentheywereputinprisonandlostfreedom_____itsimportance.（单选）A.theyrealizedB.didtheyrealizeC.theyrealizeD.dotheyrealize
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题目内容：
Only when they were put in prison and lost freedom_____ its importance.（单选）
A.they realized B.did they realize C.they realize D.do they realize
优质解答
B
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