Inthecountry,about30%ofthelan

发布时间:2020-07-27 22:58:11

In the country, about 30% of the land ________ yet.A.hasn’t been farmedB.haven’t been farmedC.has already farmedD.have already farmed

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A解析该句主语为不可数名词land,所以谓语应用单数,可排除B、D项;yet通常与完成时态连用,并且用于否定句,所以
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