为什么 选这个
1.It ____for 5 days and no one knows when it will stop.
A.has rained B.is raining C.has been raining D.was raining
为什么选【C】而不选【B】
2.I was told that he ___a speaking note yesterday but I don't know whether he has finished it.
A.was writing B.wrote C.had written D.has written
3.The college graduate insisted that he_____to Tibet for the Western Development.
A.be sent B.was sent C.would be sent D.will be sent
4.The vegetables are cheap;however,the chef has prepared a nice meal with them.