A. has made B. had made

C. was making D. is making

【答案】A

【解析】试题分析：句意：在过去的这些年里，中国在环境保护中取得了很大的成就。由时间状语in the last few years可推知动作从过去一段时间持续到现在并对现在造成影响，用现在完成时。故选A。