试题：
| 在下列各句的空白处填入一个适当的词，使句子意思完整、语法正确。 |
| 1. When I saw him, he was walking ________ his school. 2. All the guests arrived at the party but the host didn't ________ up. 3. On Sunday school is usually _________ and students have one day off. 4. Gold is a kind of much-loved _________, so everyone likes it. 5. Yesterday Tom _________ me some money and I return it to him today. |
答案：
我来补答展开全文阅读