be worn out是固定词组吗?Your shoes are ______,pleasebuy a new pair.1、worn out 2、wear out 3、wor
问题描述：
be worn out是固定词组吗?Your shoes are ______,pleasebuy a new pair.1、worn out 2、wear out 3、wor
be worn out是固定词组吗?Your shoes are ______,pleasebuy a new pair.1、worn out 2、wear out 3、wore out为什么是1?2和3怎么不行?
答
be worn out 穿破了