________conversationwithfriends________helpfulatall.A.Tohave;wasB.Tohave;

发布时间:2020-08-04 22:36:17

________ conversation with friends ________ helpful at all.A.To have; wasB.To have; wereC.Having; wasn’tD.Having; weren’t

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C解析Having conservation with friends是动名词短语作主语,应看作单数形式,且表示否定的含义,所以选C。
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