She swims faster than I _______.A do B be C swim D am
问题描述：
She swims faster than I _______.
A do B be C swim D am
答
A
答
A do 用来代替前面提到的动词。
答
A
do 代替swim， 避免了重复
答
A do
答
A
她游得比我快.
这里后面填的词要跟swim对应上,那么就不能用am或者是be,swim本身来说不算错,但显得就很罗嗦重复,所以我们用do代替swim.