问题
选择题
The river has become much ______ than before because of the waste water from the factories.
A. dirty B. dirtier C. dirtiest
答案
B
有than知用比较级。A是原形，C是最高级。
搜题请搜索小程序“爱下问搜题”
The river has become much ______ than before because of the waste water from the factories.
A. dirty B. dirtier C. dirtiest
B
有than知用比较级。A是原形，C是最高级。