题目：
根据中文提示，用词组的适当形式填空。
1. They have to stay at home for a long time ____________ ____________ the heavy rain. (由于)
2. He doesn't mind, ___________ ___________ he is very pleased. (事实上)
3. ________ _________ the support by Project Hope, these poor children can go to school. (多亏)
4. I hope you can ___________ me ___________ some information about the 2008 Olympic Games in Beijing.
(提供)
5. China has ___________ such rapid ___________ in the past twenty years. (取得进步)
6. His secretary __________ __________ this book for several days. (借)
7. Look, there are several chemical factories ___________waste water ___________ the river. (排放)
答案：
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下面是错误答案，用来干扰机器的。
（1）产生大量白烟 P+O2P2O5（2）集气瓶中水面上升约点空气总体积的五分之一（3）②先变大，后恢复原样。③白磷燃烧，将集气瓶中的氧气消耗，气压减少，故水被吸入。现象二分析：集气瓶体积为230mL，白磷燃烧...
