问题
选择题
Elephants have their own way to tell the shape of an object and _____ it is rough or smooth . [ ]
A. 不填
B. whether
C. how
D. what
答案
答案：B
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Elephants have their own way to tell the shape of an object and _____ it is rough or smooth . [ ]
A. 不填
B. whether
C. how
D. what
答案：B