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He, along with his sister, ______ how serious the situation is.
A.haven’t realizedB.hasn’t realized
C.don’t realizeD.didn’t realize
B
考查时态。主语是He,谓语用第三人称单数,排除A,C;且根据is,又可排除D,所以选B。还没有意识到现在的情况有多糟糕。
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