A．单句填空
1．Video games can be a poor influence if ________ (leave) in the wrong hands.
答案 left [句意：电子游戏如果落入不对的人的手里就可能有坏的影响。这里考查了leave作及物动词的用法，可以理解为if (the video games are) left in the wrong hands，主从句的主语相同，省略从句中的主语和be动词。]
2．Always ________ (keep) in mind that your main task is to get this company running smoothly.
答案 keep [句意：永远记住：你的主要任务就是让这个公司顺利运作。句子没有主语且表示命令，故为祈使句，答案为keep。]
3．Give me a chance, ________ I'll give you a wonderful surprise.
答案 and [句意：给我一次机会，我会给你一个惊喜。本题考查特殊句式中的“祈使句＋and＋陈述句”句式。故填and。]
4．________(make) what you're doing today important, because you're trading a day of your life for it.
答案 Make [句意：让你今天做的事情有意义，因为你
正拿你生命中的一天来换取它。本题考查特殊句式。根据句意可知前半句为祈使句，用来给别人提建议，故填动词原形Make。]
5．This is a really lively party. There is a great atmosphere，________ there?
答案 isn't [句意：这真是一个活跃的聚会，这有很好的气氛，是吗？根据分析，这是there be句型的反意疑问句，前半句肯定，附加句否定。]
B．单句改错
1．Observing carefully if any change occurs when doing experiments in the lab.
________________________________________________________
答案 Observing→Observe [分析句子结构可知，主句为祈使句，故用Observe。]
2．—I spent two weeks in London last summer.
—Then you must have visited the British Museum during your stay, mustn't you?
________________________________________________________
答案 mustn't→didn't [答语为反意疑问句，must have done表示对过去的肯定推测，且根据时间状语last summer可知用didn't。]
3．Read this story, or you will realize that not everything can be bought with money.
________________________________________________________
答案 or→and [句意：读这个故事，你会意识到并非所有的东西都能用钱买到。本题考查“祈使句＋and/or＋陈述句”句型。该句型中两个分句如果用and连接，祈使句相当于if引导的肯定形式的条件状语从句；如果两个分句用or连接，祈使句相当于：If... not...。本句题干可改为：If you read this story, you will realize that not everything can be bought with money.。]
4．Every day reading a proverb aloud several times until you have it memorized.
________________________________________________________
答案 reading→read [分析句子结构可知，此句为祈使句，故用read。]
易错题一：句型“It＋be＋时间＋since/before/that/when...”的误用
[例1] It is three years ________ he worked here and now he works in another city.
[错解] that/when/before
[错因分析] 本题易错填before, that或when，原因可能是考生将句子理解成了一个强调句或者含有when/before的句型等。
[答案] since
[心得体会]
[例2] British people are not so patient as before. It lasts an average of 8 minutes and 22 seconds ________ they lose their temper，according to a new research.
[错解] when
[错因分析] 本题易误用when，原因可能是考生没有理解此题的语境，也没对句子的时态进行分析。此处用before, before作连词，意为“在……之前”，表示动作发生的顺序。句意：英国人不像以前那么有耐心了。新的研究表明，平均每8分22秒他们就会发脾气。
[答案] before
[心得体会]
易错题二：so/such...that...中so与such的误用
[例] It was ________ fine weather that they all went swimming.
[错解] so
[错因分析] 考生可能只注意到了形容词fine，而忽视了fine weather的中心词是名词weather，因而误用so。
[答案] such
[心得体会]
易错题三：It is/was not until...that强调句型的误用
[例] It was not until all the fish died in the river ________ the villagers realized how serious the pollution was.
[错解] when
[错因分析] 本题易误用when，原因可能是考生没有掌握It is/was not until...that句型。
[答案] that
[心得体会]