A．单句填空
1．There the air is clean________the mountains are green.
答案 and [句意：那里空气清新且山脉一片绿。前后句为并列关系，故填and。]
2．He is a shy man，________ he is not afraid of anything or anyone.
答案 but [句意：他是一个害羞的人，但他不惧怕任何人和事。空处前后两个分句之间为转折关系，故用连词but。]
3．In that case, eat before the flight，________an empty stomach will prevent you from sleeping.
答案 or [句意：在那种情况下，在乘飞机之前要用餐，否则空腹会让你睡不着觉。这是一个“祈使句＋and/or＋陈述句”的句式，祈使句“eat before the flight”和“an empty stomach”是相反的，故用or。]
4．Give me a chance, ________I'll give you a wonderful surprise.
答案 and [句意：给我一个机会，我会给你一个很大的惊喜。前后文之间是顺承关系，故用and。题干为“祈使句＋连词＋陈述句”句式。]
5．Some animals carry seeds from one place to another，________plants can spread to new places.
答案 so [句意：一些动物把种子从一处带到另一处，这样植物就能传播到新的地方。根据句意可知，此处表示结果。故用so来连接并列句。]
6．Give them their happiness ________ you will get your own happiness.
答案 and [句意：给他们快乐，你也能收获到你自己的快乐。本句是“祈使句＋and＋陈述句”句式。]
7．They are open for one more day, ________ I'm going to see it tonight.
答案 so [句意：它们会再开放一天，因此我今天晚上想去看。for one more day导致了go to see it tonight，所以本空填表示结果的连词so。]
8．I would like to have seen some dingoes(野狗), ________I didn't.
答案 but [句意：我本想去看一些野狗，但是并没有去。根据would like to与I didn't的对比判断，本空填表示转折的but。]
9．And they may be ________ round or square.
答案 either [句意：它们可能是圆的或方的。根据round和square判断填either; either...or....意为“或者……或者……”。]
10．Should we choose a good major ________ a good university first?
答案 or [句意：我们应该先选好的专业还是好的大学？根据choose判断，a good major和a good university是选择关系，故填or。]
B．单句改错
1．In fact, I don't like to go anymore, and I'm afraid I'll lose their friendship.
________________________________________________________
答案 and→but [前后分句为转折关系，故用but。]
2．But the river isn't changed in a few days and even a few months.
________________________________________________________
答案 and→or [根据句意，此处表示一个递进含义的词，故用or; or even“甚至”。]
3．It asks you to act like water: to be flexible as well strong.
________________________________________________________
答案 strong前加as [as well as是固定短语，连接两个并列成分。]
4．There's no way of knowing why one man makes an important discovery when another man, also intelligent, fails.
________________________________________________________
答案 when→while [根据语境此处表示前后对比，故用while。]
5．Don't turn off the computer before closing all programs, but you could have problems.
________________________________________________________
答案 but→or/otherwise [根据语境可知，此处表示“否则”，故用or/otherwise。]
6．We're going to the bookstore in John's car. You can come with us and you can meet us there later.
________________________________________________________
答案 and→or [根据语境可知，两者之间是选择关系，故用or。]
7．One more hour I'll get the job finished.
________________________________________________________
答案 I'll前加and [本句为“祈使句/名词短语＋and＋陈述句”的固定句式。]
8．I'd like to study law at university when my cousin prefers geography.
________________________________________________________
答案 when→while [根据语境可知，前后两种情况对比，故用while。]
9．Thanks for your advice, and this is something I have to figure out myself.
________________________________________________________
答案 and→but [根据语境可知，此处表示转折，故用but。]
10．The greatest glory in living lies not in never falling, and in rising every time we fall.
________________________________________________________
答案 and→but [根据分析句子结构，此处是“not...but...”意为“不是……而是……”，故用but。]