A cold wind began to blow and he turned up his collar to ________ the cold．
A.keep upB.keep awayC.keep offD.keep out在线课程D
解析：
考查动词短语。keep out“不让……入内，留在外面，置身……之外”(remain outside); keep up“保持不下降，使不低落”；
keep away“远离，不接近”(avoid coming/going near to); keep off“远离，不来”(remain at a distance; not come)。