________ is very difficult ________ such a high mountain. A. This；to climb B. It；to climb C. This；cl...
2022-10-21 17:21:03 139次 2017-2018学年七年级（人教版）英语下册培优测试卷：Unit12 单选题 反馈错误 加入收藏 正确率 : 100%
题目内容：
________ is very difficult ________ such a high mountain.
A. This；to climb B. It；to climb C. This；climbing D. It；climbing
本题链接：
