单选题：_____ you have come here, you may devote yourself to doing y..

Why not stay at home _____the road is so slippery after the heavy snow?A. when B. unless C. even ifD. now that

She insisted that she ______ not guilty , but we insisted that she ____ into prison. [ ]A．was; be put B．be ; was put C．should be; was put D．was;should put

_____he has made up his mind, no one can make him change it.A. Once B. Until C. Unless D. As

—May I take this book out of the reading room?—No，you ________.You read it in here.A．mightn’tB．won’tC．needn’tD．mustn’t

We won't give up _____ we fail ten times.A. even ifB. so that C. whetherD. as if