2. 外语
  3. Most environmental problems exist because adequate measures for preventing them______taken in the past.

Most environmental problems exist because adequate measures for preventing them______taken in the past.

admin2014-09-18  37
问题 Most environmental problems exist because adequate measures for preventing them______taken in the past.
选项 A、was not
B、were not
C、were not being
D、had not been
答案B
解析
转载请注明原文地址:https://jikaoti.com/ti/dFxMFFFM
0

专业英语四级

相关试题推荐
随机试题
最新回复(0)