Most environmental problems exist because adequate measures for preventing them_____taken in the paA、was notB、were not beingC、were notD、being not选哪个 详细 分析下各个选项.这个题对我很重要 .感谢帮助.还有 been 和b

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Most environmental problems exist because adequate measures for preventing them_____taken in the paA、was notB、were not beingC、were notD、being not选哪个 详细 分析下各个选项.这个题对我很重要 .感谢帮助.还有 been 和b

Most environmental problems exist because adequate measures for preventing them_____taken in the paA、was notB、were not beingC、were notD、being not选哪个 详细 分析下各个选项.这个题对我很重要 .感谢帮助.还有 been 和b
Most environmental problems exist because adequate measures for preventing them_____taken in the pa
A、was not
B、were not being
C、were not
D、being not
选哪个 详细 分析下各个选项.这个题对我很重要 .感谢帮助.还有 been 和being 该怎么区别 ?做被动的时候应该用哪个啊?10分全部送上 .

Most environmental problems exist because adequate measures for preventing them_____taken in the paA、was notB、were not beingC、were notD、being not选哪个 详细 分析下各个选项.这个题对我很重要 .感谢帮助.还有 been 和b
选C,现在的污染是因为过去的失误.做被动用been

这句话的意思是：大多数环境污染问题的存在是因为充分预防措施在过去没有被重视。
首先这个句子的重点是~预防措施没【被】重视，所以答案一定要体现【被动】
句意是说污染问题还在是因为 【过去】防护措施 没被重视，而不是【过去某个时刻】没被重视，所以排除C，D
注意：（were being+过去分词 表示过去进行时的被动语态。如The builidings were being b...

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这句话的意思是：大多数环境污染问题的存在是因为充分预防措施在过去没有被重视。
首先这个句子的重点是~预防措施没【被】重视，所以答案一定要体现【被动】
句意是说污染问题还在是因为 【过去】防护措施 没被重视，而不是【过去某个时刻】没被重视，所以排除C，D
注意：（were being+过去分词 表示过去进行时的被动语态。如The builidings were being built this time last year.这些大楼去年的这个时候正在修建。）
（being not done不成结构，必须是 be being not done)
又因为是them 复数 所以选B

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