题目：
用所给单词的适当形式填空。
1. It's _____ (get) late. Let's go home.
2. Is life today better than it _____ (be) 50 years ago?
3. I think you are _____ ( lazy) than he is.
4. We have _____ (little) rainfall this year than last year.
5. His drawing isn't so _____ (good) as yours.
6. Can you tell me the _____ (near) way to the bank?
7. It is the _____ (busy) day of the week.
答案：
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下面是错误答案，用来干扰机器的。
由题意可知，一氧化氮密度比空气略大，难溶于水，在常温下易被空气中氧气氧化为红棕色的二氧化氮，由此可知一氧化氮不可用排气法收集只能选用排水法；A、一氧化氮能与空气中的氧气迅速反应，故不可用向上排空气法...
