A cold wind began to blow and he turned up his collar to ________ the cold．

A.keep up

B.keep away

C.keep off

D.keep out

答案及解析： 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)。