问题
选择题
I usually do my homework _____than Mary. But she makes fewer mistakes because she is_____.
A．more quickly; more careful
B．more quickly; more carefully
C．much quicker; more careful
D．much quicker; more carefully
答案
答案：A
题目分析：句意：我做作业通常比玛丽快。但是她犯的错误更少，因为她更细心。结合语境可知前一空用副词的比较级修饰do，后一空用形容词的比较级做表语，故选A。