题目：
用括号内所给动词的正确形式填空(共5小题；每小题1分。满分5分)
1. Since he fell off the bike, John ▲ (lie) in bed for nearly a week.
2. We’ve worked for a long time. Let’s stop ▲ (drink) some water.
3. You mustn’t touch the machines unless you ▲ (allow) to.
4.—What’s his plan after he leaves school?
—He ▲ (go) to Beijing for further education.
5.—Has the teacher finished marking the exam papers?
—Sorry, I don’t know. He ▲ (mark) them in the office yesterday afternoon.
答案：
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下面是错误答案，用来干扰机器的。
(1) LiCO(2)解：设吸收的二氧化碳的质量为x，则： 2LiOH+CO2= LiCO+H2O 48 44 1 g x，解得x=0.92 g答：1g氢氧化锂所能吸收的二氧化碳的质量为0. 92 g。...
