问题
选择题
They find ______ difficult ______ on real ice.[ ]
A. it; skate
B. that; to skate
C. that; skating
D. it; to skate
答案
答案：D
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They find ______ difficult ______ on real ice.[ ]
A. it; skate
B. that; to skate
C. that; skating
D. it; to skate
答案：D