问题
选择题
When the temperature drops to 0℃, ice ________ on the surface of water. [ ]
A. has
B. floats
C. forms
D. produces
答案
答案：C
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When the temperature drops to 0℃, ice ________ on the surface of water. [ ]
A. has
B. floats
C. forms
D. produces
答案：C