考点一 并列句
1．there's no way of knowing why one man makes an important discovery ________ another man, also intelligent, fails.
解析：句意：没办法知道为什么有人能够有重大发现，而有的人同样聪明，却不能。while在这里表示两种情况的对比。
答案：while
2．i was glad to meet jenny again, ________ i didn't want to spend all day with her.
解析：句意：很高兴又见到珍妮了，但我不想花一整天的时间和她在一起。根据句意可知前后两个分句之间是转折关系，所以用but或yet。
答案：but/yet
3．don't turn off the computer before closing all programs, ________ you could have problems.
解析：句意：不要在关闭所有程序之前就把电脑关闭，否则你可能会遇到棘手的问题。or连接两个句子，意思是“否则”。
答案：or/otherwise
4．read this story, ________ you will realize that not everything can be bought with money.
解析：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.
答案：and
5．go to the village and buy some salt, but pay a fair price for it: neither too much ________ too little.
解析：此处为neither ...nor ...“既不……也不……”，是并列连词，为固定搭配。
答案：nor
6．you have to move out of the way ________ the truck cannot get past you.
解析：句意：你必须让开路，否则卡车无法通过。or否则。
答案：or
7．at school, some students are active ________ some are shy, yet they can be good friends with one another.
解析：句意：在学校里，有些学生很活跃，而有些却很害羞，但是他们互相能成为好朋友。while表示两者的对比。
答案：while
