Although the causes of cancer ____we do not yet have any practical way to prevent it.A．are being uncoveredB．have been uncoveringC．are uncoveringD．have uncovered-高中英语-n多题

◎ 题干

Although the causes of cancer ____we do not yet have any practical way to prevent it.

A．are being uncovered	B．have been uncovering
C．are uncovering	D．have uncovered

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◎ 解析

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◎ 知识点

根据n多题专家分析，试题“Although the causes of cancer ____we do not yet have any practical way to prevent it.A．are being uncoveredB．have been uncoveringC．are uncoveringD．have uncovered…”主要考查了你对【现在进行时】，【现在进行时的被动语态】等知识点的理解和应用能力。关于这些知识点的“档案”，你可以点击相应的链接进行查看和学习。

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