高等继续教育 / 大学英语语法
正确率:100%
题型描述: 单选题
It is hard _____ a high mountain.
A.to be climbing
B.climbed
C.to climb
D.climb
It is hard _____ a high mountain.
A.to be climbing
B.climbed
C.to climb
D.climb
参考答案:
佳题速递: