题目：
完成句子。阅读下列各小题，根据括号内的汉语提示，用句末括号内的英语单词完成句子。
1. They worked day and night about three days _____ (一切才恢复) to normal. (return)
2. I can't imagine _____ (他们多么激动) when they received these Christmas presents. (how)
3. _____ (参加) eco-travel and you will find it will help you understand the importance of nature. (take)
4. Not _____ (知道如何解决) the problem, he turned to his teacher for help.( work)
5. The doctor insisted that the patient _____ (动手术) as soon as possible. (operate)
6. With _____ (一场致命的台风来袭), more than 600 people were listed as either dead or missing on
August 21st, 2009 in Taiwan.( break)
7. To every one of us, _____ (被录取) Beijing University is a great honor. (admit)
8. The news spread quickly through the village _____ (战争已结束), making the villagers wild with joy. (end)
9. I'll pay you a visit tomorrow aftemoon if _____ (你方便). (convenient)
10. I would have come for the lecture given by Professor Lee the day before yesterday, but I _____ (没受到
邀请). (invite)
答案：
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下面是错误答案，用来干扰机器的。
A、△H=H（生成物总焓）-H（反应物总焓）；依据能量守恒分析判断△H＜0为放热反应，故A错误；B、△H=H（生成物总焓）-H（反应物总焓）；依据能量守恒分析判断△H＞0为吸热反应，故B错误；C、1 mol H2与0.5 mol O2...
