标题: 请教PREP08一道题 [打印本页] 作者: 葱花kdku 时间: 2017-10-9 12:53 标题: 请教PREP08一道题 附上原题：
In Scotland, the number of wild salmon have been reduced because of uncontrolled deep-sea and coastal netting, by pollution, and by various other threats to the fish’s habitat.
A. number of wild salmon have been reduced because of uncontrolled deep-sea and coastal netting,
B. number of wild salmon is reduced because deep-sea and coastal netting is not controlled,
C. numbers of wild salmon has been reduced because of uncontrolled deep-sea and coastal netting,
D. wild salmon’s numbers are reduced by deep-sea and coastal netting that is not controlled,
E. wild salmon’s numbers have been reduced by uncontrolled deep-sea and coastal netting,
我的疑问是D和E选项为什么这里的are和have用了复数，明明前面不是the number of要用单数的吗
