问题描述：
the room is in a terrible mess ________（一定没打扫过）
答案是cant have been cleaned 但是我觉得应该用 has
答案是cant have been cleaned 但是我觉得应该用 has
问题解答：
我来补答展开全文阅读
问题描述：
问题解答：
我来补答