2. 外语
  3. (Ever since) the world (began), nations (have difficulty) (in keeping) peace with their neighbors.

(Ever since) the world (began), nations (have difficulty) (in keeping) peace with their neighbors.

admin2007-10-13  60
问题 (Ever since) the world (began), nations (have difficulty) (in keeping) peace with their neighbors.
选项 A、Ever since
B、began
C、have difficulty
D、in keeping
答案C
解析 应改为have had difficulty。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://kaotiyun.com/show/23PO777K
0

成人本科学位英语

相关试题推荐
随机试题
最新回复(0)