摘要: ----Don’t skate on the lake! ----Why not? Isn’t it thick enough ? A. to skate B. to skate on C. skate D. skate on
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—Don't skate on the
lake!
—Why not? Isn't it thick enough ______?
—Why not? Isn't it thick enough ______?
[ ]
A. to skate
B. to skate on
C. skate
D. skate on
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B. to skate on
C. skate
D. skate on