帮助他人的表达方式 — 英语词汇题
题目
根据句意及首字母提示补全单词：1. It's k______ of you to help the old man carry his bag. 2. The students r______ money for the poor children last week. 3. We should give our seats to people in n______ on the bus. 4. He has the a______ to swim across the river.