__________ is really hard __ them to climb such a high mountain. A．This; toB．It; to C．This; forD．It;...
2022-12-19 19:16:05 124次 2016届甘肃定西安定区公园路中学九年级英语上第一次月考试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
__________ is really hard __ them to climb such a high mountain.
A．This; toB．It; to
C．This; forD．It; for
本题链接：
