Since the road is wet this morning,_____last night.
问题描述：
Since the road is wet this morning,_____last night.
A.it must rain B it must have have rianed Cit must be rianed
As the physics is hard enough,i ____study it.
A can't B cannot C amnot able to
question1:can't和cannot有什么区别
答
1.B不过应该是it must have rianed （现在完成时,表过去发生的事情（昨晚下雨了）对现在造成的影响（地上是湿的））2.C（物理题太难了,做不出来（即能力不够））很简单一个记法,表肯定意思就是must,表否定意思就是ca...