摘要： It is difficult for us climb up the mountain. A. very; can’t B. too; not C. too; to D. very; to
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It is _______ difficult for us _______ climb up the mountain.
[ ]
A. very, can' t
B. too, not
C. too, to
D. very, to
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B. too, not
C. too, to
D. very, to