问题描述：
完整题目The two students_____ ill yesterday,and they didn’t come to school.
A.are all B.were all C.are both D.were both
选哪个,为什么
急
A.are all B.were all C.are both D.were both
选哪个,为什么
急
问题解答：
我来补答展开全文阅读