12．Ask any Chinese which city in China is famous for ice and snow, __and__ the answer is sure to be Harbin.

解析：句意为：(如果)你问任何一个中国人中国的哪座城市因冰雪而出名，答案一定是哈尔滨。此处为“祈使句＋and/or＋陈述句”的结构，两个分句之间为顺承关系，故填and。

13．Stick to what you think is right, __and__ you will gain a surprising happy ending.

解析：句意为：坚持你认为正确的，你会拥有一个幸福的结局。此处为“祈使句＋and/or＋陈述句”的结构，两个分句之间为顺承关系，故填and。

14．—Can I lie about seeing a text message because I was too busy or lazy to respond to it?

—Receiving a text message does not necessarily mean you have to respond. Why waste a perfectly good lie __when__ the truth will serve?

解析：句意为：——当我很累或懒得去答复时，我可以撒谎说没看过短信吗？——收到短信并不一定意味着必须回复。为什么非得滥用一个精心编造的谎言而不去说实话呢？对比分析主从句谓语的动作可知是同时发生，因此用时间状语连词when表示“当……时候”。

15．Though it has been one year __since__ he came to the city, he knows every street here like the back of his hand.

解析：句意为：尽管他来这座城市仅仅一年，但是他对这儿的每条街道了如指掌。本题考查固定句型“it has been＋时间段＋since...”，表示“自从……已经多久了”。

16．—What did he think of the trip to Beijing last month?

—He had such a good time __when__ he visited the Great Wall.

解析：句意为：——他认为上个月的北京之行怎么样？——当他去参观长城时玩得很开心。设空处引导时间状语从句，表示“当……时候”，故填when。本题容易误用成“such...that...”结构。

17．Little __as/though__ he knew about classical music, he pretended to be an expert on it.

解析：句意为：尽管他对古典音乐了解很少，但他假装对此是名专家。分析句意及句子结构可知，设空处所在分句为让步状语从句，且否定词little位于句首，应用倒装结构，故填as或though。although也表“尽管”，但其引导的从句要用正常语序，故不填。

18．People in Dali are very friendly and honest to you __whether__ you are a foreigner or just a local.

解析：句意为：大理的人对你很诚实而友好，无论你是外地人还是当地居民。whether...or...表示“无论是……还是……”，引导让步状语从句。

19．You can smoke here __if__ you leave a window open to let the smoke out.

解析：句意为：如果你留一扇窗户使烟散发出去，你就可以在这里吸烟。根据句意可知，此处为条件状语从句，表示“如果”，故填if。

20．Just__as__ a single word can change the meaning of a sentence，a single sentence can change the meaning of a paragraph.

解析：句意为：正如单独一个词能改变一个句子的含义一样，一个独立的句子也能改变一个段落的含义。just as意为“正如，正像”，符合句意。

Ⅱ. 语法填空

在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

My classmate Michael studied very hard __1. after__ he went to senior school. Every day he worked __2. until__ every one left the classroom. He said he wouldn't stop trying __3. unless__ he got satisfying scores in his studies. Hard __4. as/though__ he tried, he made little progress, but he didn't lose heart at all __5. because__ he believed as long as he persisted he would succeed one day. __6. As__ time went by, he made improvements in his studies and he was admitted to a university in Guangzhou at last. We had a get－together party __7. before__ we started our new life in university. __8. Since__ everyone had got offers from universities, we had a very good time. When we stood __9. where__ we used to play and study, we couldn't help thinking of our happy old days. We believed we would never forget each other, __10. wherever__ we would go or whatever we would do. Before we departed, __11. although/though__we seemed a little sadder __12. than__before, we still fought back the tears.

Ⅲ. 单句改错

1．But no sooner had I left when the bus arrived.

答案与解析：when→thanno sooner...than...“刚……就……”，是固定用法。

2．The people's life here has become rich or colorful.

答案与解析：or→and此处表示“生活丰富多彩”，rich与colorful是并列关系，且本句是肯定句，故连词用and。

3．I called my parents, so I did not tell them what had happened.

答案与解析：so→but由called与did not tell...的对比判断连词用but。表示“我给父母打电话了，但是没有告诉他们发生了什么”。

4．It isn't very cold, but you needn't bring many clothes with you.

答案与解析：but→so天不太冷“所以”没有必要带很多衣服，连词用so，表示结果。

5．It may be popular, and you may also get others confused.

答案与解析：and→but由“get others confused”判断连词用but，表示“可能会受欢迎，但是也会让别人很困惑”。

6．(2015·四川)In fact, I don't like to go anymore, so I'm afraid I'll lose their friendship.

答案与解析：so→but作者不喜欢再去那里，“但是”又害怕失去他们的友谊，此处表示转折，因此要用but。

7．I'm sure that until we keep on practising, it will be easy for us to learn spoken English well.

答案与解析：until→if此处表示“如果我们不断地练习，学好英语口语对我们来说就会很容易”，所以用连词if引导一个条件状语从句。

8.One day, I was cooking in the kitchen as the telephone rang.

答案与解析：as→whenbe doing...when...“正在做某事，这时……”，是固定句式。

9．Charles Rolls, a car maker, was very interested in Royce's car, but soon Rolls and Royce went into business together.

答案与解析：but→and“很快他们就合作了”是顺承前一句所说的事情发生的，故连词用and。

10．Work hard, you will make much progress and realize your dream.

答案与解析：you前加and本句是“祈使句＋and＋陈述句”句式，表示“做……，那么你就会……”。

11．Though not very big, but the restaurant is popular in our area.

答案与解析：去掉but句意：餐馆虽然不大，却在我们这个区域很受欢迎。though不和but连用，因though位于句首，故去掉but。

12．(2016·新课标Ⅰ)Every day he makes sure that fresh vegetables or high quality oil are used for cooking.

答案与解析：or→and句意：每天他都确保用于烹饪的是新鲜的蔬菜和高质量的油。从句意判断前后是并列关系，故把or改为and。

13．If we stay at home, it is comfortable but there is no need to spend money.

答案与解析：but→and句意：如果我们待在家里，会很舒服而且也没有必要花钱。上下句之间是并列关系，而非转折关系。

14．Mom has a full－time job, so she has to do most of the housework.

答案与解析：so→but句意：妈妈做全职工作，但是她得干大部分家务活。前后句之间为转折关系，故应用but连接。

15．Both Dad or I planned to do something on Mother's Day.

答案与解析：or→and句意：爸爸和“我”都打算在母亲节这一天做一些事。both...and...“两者都……”，是固定结构，符合语境。