I left for the office earlier than usual this morning _____ traffic jam. A. in line with B. in case of C. for the sake of D. at the risk of 答案:Bin case of以防;in line with与......一致,符合;for the sake of 为了......起见;at the sake of冒......的风险。若x+y=2,b<x<a,则下列不等式正确的是( )
A.2-a<y<2-b B.2-b<y<2-a
C.b+2>y>a+2 D.b+2<y<a+2