_______， it is quite easy to drill a hole in it with a eraser.

_______， it is quite easy to drill a hole in it with a eraser.
A、Hard a diamond is
B、Hard as a diamond is
C、As a diamond is hard
D、How hard is a diamond
【正确答案】：B
【题目解析】：as引导让步状语从句，必须采用倒装结构，但不是主谓倒装，而是将被强调的内容置于句首。如：Much as I have traveled，I have never seen anyone to equal her. 由此可知B为正确答案，这里强调的是钻石的坚硬(hard)。