Muskrats generally ( )close to the edge of a bog ,where their favorite plant foods grow plentfully.A stay B to stay there C staying D they are stayinggenerally doing sth,有这个用法吗？
问题描述：
Muskrats generally ( )close to the edge of a bog ,where their favorite plant foods grow plentfully.
A stay
B to stay there
C staying
D they are staying
generally doing sth,有这个用法吗？
答
A
before doing must have is or are
答
填谓语
只有A能
不能用doing ,这样没有谓语