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选出划线单词的正确意义。 1. I offered to give him a lift but he declined . A. 衰退 B. 减少 C. 婉拒 2. My math class is worth three credits . A. 信用 B. 学分 C. 存款额 3. How do you pass your time while staying at home? A. 消磨;打发 B. 经过 C. 传递 4. After returning to his hometown, he decided to run a cafe. A. 经营;管理 B. 运行;运转 C. 操作 5. The river ran dry during the drought. A. 跑步 B. 变成;成为 C. 流动 6. Glass contracts as it cools. A. 签合同 B. 收缩;缩小 C. 感染