How deep is the hole?It's ______的答案和讲解

问题描述:

How deep is the hole?It's ______的答案和讲解
A four metre deep B four metres deep C four-metre-deep D four-metres-deep

B
首先排除A D
C的话是做为一个形容词,4米深的,并不能用于回答洞的深度.