The socks were too tight and it was only by _____ them that Peter managed to get them on

问题描述:

The socks were too tight and it was only by _____ them that Peter managed to get them on
A.expanding
B.extending
C.stretching
D.lengthening
选哪个?为什么?

C:
尽管4个词都有伸长的意思,只有C有撑拉变长的意思.
She stretched the material.
她撑拉这种材料.