________ is really hard ________ them to climb such a high mountain. A. This; to B. It; to C. This; ...
2022-11-01 17:58:14 209次 牛津译林版8B unit6 单元测试 单选题 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; to B. It; to
C. This; for D. It; for
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