The question is more difficult to answer _________.

问题描述:

The question is more difficult to answer _________.
A as is commonly supposed
B than it commonly supposed
C as it is commonly supposed
D than is commonly supposed

选择D,more提示后面是than,然后要用被动语态,因为是answer be supposed所以就是D啦.
than 在这里是一种特殊的用法,既是连词又是代词.例如:The car costs more money than is really worth.记住它.!望采纳,谢谢!