__--These boxes are too heavy for me to carry.I 'll give you a hand __ them.( of ,to ,for ,by)
问题描述:
__--These boxes are too heavy for me to carry.I 'll give you a hand __ them.( of ,to ,for ,by)
该选那一个
答
It's so easy.We can only choose the preposition "to" among the four.