Jack must be helping his grandma to water the flowers,______?A.is heB.isn’t he C.must heD.mustn’t he

题目简介

Jack must be helping his grandma to water the flowers,______?A.is heB.isn’t he C.must heD.mustn’t he

题目详情


Jack must be helping his grandma to water the flowers,______?
A.is heB.isn’t he C.must heD.mustn’t he
题型:单选题难度:偏易来源:不详

答案

B
考查反义疑问句。Must表推测时,反义疑问句要根据句子的实际意义进行反问,而不是根据前面出现的情态动词,句意:杰克肯定在帮助他的奶奶浇花,是不是?所以排除C,D;且前面句子是肯定,所以后面要用否定形式。所以选B。

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