第13题: [单项选择]He then ______ overalls (工作服) and spent the next eight hours as a dustman. A. changed into B. exchanged for C. altered D. turned into 参考答案:A 答案解析:本题为近义词辨析题。changed into 意为“变成”;exchanged for 意为“交换”;altered意为“改变”;而 turned into 意为“(使)变成”。本句大意为:于是他换上