关于形容词比较等级I'm not sure if Mary can sing _____ Mabel.A as good as B as well as C so good as D as better as为什么

关于形容词比较等级I'm not sure if Mary can sing _____ Mabel.A as good as B as well as C so good as D as better as为什么
关于形容词比较等级
I'm not sure if Mary can sing _____ Mabel.
A as good as B as well as C so good as D as better as
为什么

关于形容词比较等级I'm not sure if Mary can sing _____ Mabel.A as good as B as well as C so good as D as better as为什么
选 B
I'm not sure if Mary can sing _as well as_ Mabel.
这里sing动词后用副词,good 应该为well.