Peter sat under a tree and seeing his friends,---up in no time.

问题描述:

Peter sat under a tree and seeing his friends,---up in no time.
a.to stand b.standing c,stood d.would stand
为什么选c啊?

空前面有个逗号是吧,那么这两句就是平行结构
前半句用了sat动词过去时,后半句自然也是对应动词过去式stood
所以是 c