几道不知如何解释的英语单选题
1、please do _____you have been told to.
A but B for C as D so that
为什么不选b呢）
2______it is so early,I don't think we should go now.
A although B if C as D that
(答案为a,为什么不选c呢）
3 I have a letter____,so I can't go to see a flim with you .
A to write B to be written C written D writing
为什么不选a呢）