【正确答案】 A

【答案解析】[解析] other wise you wouldn"t have caught cold“否则你就不会得感冒了”。第一句是陈述句“你穿的衣服不够”，otherwise引导一种相反的假设，是含蓄虚拟条件句，相当于if you had put on more clothes，就会有wouldn"t have caught cold的结果；wouldn"t have p.p.(现在完成时)是虚拟过去的结果。