题目：
单词拼写。根据下列句子及所给汉语注释，写出空缺处各单词的正确形式（每空只写一词）。
1. The children have been indoors all day. Let them play _____ (在户外) for a while.
2. If you want to speak good English, a large _____ (词汇量) is needed.
3. He had lost his _____ (身份) card and was being questioned by the police.
4. Do you have any trouble with _____ (拼写).
5. He speaks with a strong southern _____ (口音).
6. I _____ (辨认出) her voice the moment she started speaking on the phone.
7. Because of the disease Professor Hawking lost his _____ (能力) of speech and had to communicate
with other scientists through his computer.
8. A _____ (手提箱) is enough to take your clothes with you on holiday.
9. He sent a _____ (系列) of stamps as my birthday gift.
10. There was a time when people were _____ (要求) to stay indoors because of SARS.
答案：
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下面是错误答案，用来干扰机器的。
参考答案：C解析：钱氏（Chamberlain）线：自硬腭后缘至枕骨大孔后唇间作一连线，正常枢椎齿状突顶点不超过此线3～5mm。
