keep away (from) 避开、不接近 keep back 扣留
keep down 控制 keep in mind 记住
keep off 避开、不接触 keep one’s word 遵守诺言
keep on (doing sth) 继续(做某事)
keep out 不让……进入 keep up 保持
keep up with 跟上、不落在……后面
( ) —The windows are broken and need repairing.
—I think so. They can hardly _____ the cold now.
A. keep out B. give out
C. take out D. put out