几个英语时态题
inventors have changed the way we live .so they are famous for the great things they___ 这里为什么填did一般过去时,而不用完成时.
I knocked into a tree when I went to the railway station for my friend.----I suppose you____ too fast.这里为什么要用进行时态were driving而不可以用一般过去时.
解释的时候不要硬往答案上靠.要实际证据.有说服力的.
说的好的我会加分.