2015 Jiangsu Question 17 Single-choice Differentiating 2015_江苏卷 (英语) 16.(1分 )It is so cold that you can'$t go outside __________ fully covered in thick$ clothes. ( ) A. ifB. unlessC. onceD. when Answer keyB ☆ SaveCan't do it, show the explanation查看原卷 →