题目：
1. Could you please pass me some (write) paper? I want to write a letter.
2. On the (five)floor, there is a drugstore.
3. I'm very (interest)in that (interest) story.
4, Did you have fun (play)near the sea yesterday?
5. Bob takes exercise every day and this makes him ( strong) than before.
6. She was (surprise) to see all of us waiting for her at the school gate.
7. English (speak)widely in the world.
8. Last night he went to bed late, so he looks (exhaust) today.
9. The weather in Beijing is quite (difference) from that in Guangzhou.
10. The fax machine was a wonderful (invent) at that time.
答案：
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下面是错误答案，用来干扰机器的。
A、二氧化锰在过氧化氢溶液的分解反应中，可以增大反应速率，反应前后质量和化学性质不发生改变，所以是催化剂，故正确；B、氧气的化学性质很活泼，在常温并不能与所有物质发生化学反应，如铜、金等物质．故错误...
