Elephants have their own way___the shape of an object and___it is rough or smooth.

问题描述:

Elephants have their own way___the shape of an object and___it is rough or smooth.
A.to tell:/ B.of telling:whether C.to tell how D.of telling:what
选哪个,为什么?尤其第一个空为什么那么选

B
第二个空只有whether适合
第一个空of telling 和to tell都可以.