问题
选择题
This history book is _______ that one, but ______ than that one.
A．as difficult as; interesting
B．as more difficult as; more interesting
C．as difficult as; more interesting
D．more difficult as; as interesting
答案
答案：C
题目分析: 句意：这本历史书和那本书一样难，但比那本书更有趣。as...as和……一样，形容词用原级；than比，形容词用比较级，故选C.