A(Ever since) the world B(began) nations C(have difficulty) in D(keeping) peace

游客2025-03-12 53

问题 A(Ever since) the world B(began) nations C(have difficulty) in D(keeping) peace with their neighbors.

选项

答案 C

解析应改为have had difficulty。因为ever since引导句子的时候，从句用过去时，主句要用现在完成时。

转载请注明原文地址:https://www.tihaiku.com/zcyy/3994082.html

相关试题推荐

随机试题

最新回复(0)

Itis(necessary)thatthe(customs)(ofall)nations(mustberespected).A、nece