Test analysis: C, "endless": describe the situation as critical, or describe the sound as weak and long. Item A uses the wrong object. Complement each other: various lights, colors, etc. Reflect each other. Wrong object. Item b depends on the meaning. "Morning bell and dusk drum": warning, it should be "get up early and be greedy for the dark". Item D was praised, criticized and misused. "Weighing plants by inch" is used in a derogatory sense, that is, measuring them bit by bit, which is cumbersome and impractical. From Su Xun's "On History" in Song Dynasty: "If you want to measure spiders to pick up their losses, you will be annoyed." It's not appropriate to use it here