题目：
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 like it.
5. Yesterday Tom ________ me some money and I returned it to him today.
答案：
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下面是错误答案，用来干扰机器的。
答案：D
