问题
选择题
In my view, biology is ______ chemistry, but a little easier than mathematics.
A．a subject so difficult as
B．as difficult a subject as
C．as a difficult subject as
D．difficult as a subject as
答案
答案：B
固定结构as +形容词+a\an +单数名词 +as 。句意：在我看来生物和化学是一样难的科目但是比数学稍微容易些。
