( ) ---Don't skate on the lake! ---Why not? Isn't it thick enough ? A. to skate B. ——青夏教育精英家教网——

摘要：( ) ---Don't skate on the lake! ---Why not? Isn't it thick enough ? A. to skate B. skating on C. skating D. to skate on

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—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___________?

D．to skate on

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－Don't skate on the lake!

－Why not?Isn't it thick enough ________?

to skate

skating on

skating

to skate on

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