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. Which
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. Which
B
主要测试宾语从句。结合语境可知动词tell后面需要接两个宾语另外句子中存在连接词and。再结合平时的知识：和or连用的引导词是whether。句子意思：大象有它自己辨别物体形状及物体是粗糙还是光滑的方法。