单选题 Because of the economic slowdown, the government changed its policy to ______ revenue by limiting commerce.
【正确答案】 C
【答案解析】[解析] 动词词义辨析。根据句意，空格应填入与slowdown意思相近的词。选项中，只有diminish(减少，缩小)与slowdown意思相近，符合句意。故答案为C。