______that India’s annual harvest takes 13. 5 million tons of nutrients from the soil.

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问题 ______that India’s annual harvest takes 13. 5 million tons of nutrients from the soil.

选项 A、It has estimated
B、It has been estimated
C、Its being estimated
D、It estimated

答案B

解析 分析句意,印度农作物从土壤中吸收养分的数值一定是基于相关数据研究分析得出的。It为形式主语,替代从句中的内容,因此谓语部分应使用被动语态,其他选项代入句中意思均不符。故选B。
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