Elephants have their own way to tell the shape of an object and it is rough or s
来源：网络
时间：
推荐文章
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
试题答案
B
这题考查名词性从句：因为后面后or，所以用whether引导名词性从句,句意是：大象有自己的方法辨别物体的形状和它是粗糙还是光滑。选B。