表达应该做与不应该做的句型 — 英语选择题
题目
Tom 在公园里看到有人踩草坪、随手扔垃圾，还有一些小朋友在长椅上大声喧哗。Tom 想劝大家遵守规则。根据公园规则（保持安静、爱护花草、不乱扔垃圾），选出 Tom 最恰当的一句劝告：A. You should run on the grass. B. You shouldn't litter in the park, and you should keep quiet. C. You should talk loudly on the bench. D. You shouldn't be quiet in the park.