一道英语介词题the climbers carried some food ______a pack ____his backA.in;onBwith;onCin;aboveDon;on为什么选A为什么不选B
问题描述:
一道英语介词题
the climbers carried some food ______a pack ____his back
A.in;onBwith;onCin;aboveDon;on为什么选A
为什么不选B
答