vnp是什么:呵呵,麻烦各位了
来源:百度文库 编辑:中科新闻网 时间:2024/05/15 04:42:26
The tudents in my English class made lots of mistakes today.They _____trouble with the lessons.
A.must have B.must have had C.can have D.must be having
请问为什么选A啊,B,D分别错在哪呢?
A.must have B.must have had C.can have D.must be having
请问为什么选A啊,B,D分别错在哪呢?