Question

I think Jack does his homework _________than his sister.

A．careful	B．more carefully
C．carefully	D．more careful

Answer 1

B

试题分析：句意；我认为杰克做作业比他的姐姐更细心。结合语境及下文，可知用副词carefully的比较级，修饰do，故选B。
点评：副词在句子中用作状语修饰动词，英语中单音节形容词副词一般是在后加er构成比较级，双音节多音节形容词副词的比较级一般是在前面加more构成，但也有少部分加er的，牢记即可。