Until then, his family______from him for six months.

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问题 Until then, his family______from him for six months.

选项 A、didn’t hear
B、hasn’t heard
C、are being heard
D、hadn’t heard

答案D

解析从该句中until then可以看出主句的行为发生在该时间前。从该句中for sixmonths可以判断此处应用过去完成时hadn’t heard；B答案错误，因为现在完成时表示的是过去发生的动作延续到现在对现在的影响。

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专业英语四级

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Until then, his family______from him for six months.

专业英语四级

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Likeland,laborismeansofproduction.Innon-industrialsocieties,accesstobothlandandlaborcomesthroughsociallinkss

TheUnitedStatesiswell-knownforits【C1】ofmajorhigherhighwaysdesignedtohelpa【C2】getfromoneplaceto

Perhapsthemostironicaspectofthestruggleforsurvivalishoweasilyorganismscanbeharmedbythatwhichtheydesire.①Th

Allthecommunists______thepeopleinsteadofbeingservedbythepeople.

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1801Ihavejustreturnedfromavisittomylandlord—thesolitaryneighbourthatIshallbetroubledwith.Thisiscertainly

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TheUnitedStatesiswell-knownforits【C1】______ofmajorhigherhighwaysdesignedtohelpa【C2】______getfromoneplaceto

Perhapsthemostironicaspectofthestruggleforsurvivalishoweasilyorganismscanbeharmedbythatwhichtheydesire.①Th

Allthecommunists______thepeopleinsteadofbeingservedbythepeople.

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简述价值规律在私有制商品经济中的作用。

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凡能随时出售而换回现金的金融工具，一般称之为流动性强。()

裙式支座的结构特点是支座较低，由钢板制成，其优点是( )。

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