Most environmental problems exist because adequate measures for preventing them_

游客2025-02-01 22

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

选项 A、was not taken
B、were not taken
C、didn’t take
D、haven’t taken

答案 B

解析

转载请注明原文地址:http://tihaiku.com/zcyy/3938900.html

相关试题推荐

随机试题

最新回复(0)

Ididn’tgotothefootballmatchbecausetheticketwas______expensiveforme.A