20.(06浙江2)
We won’t keep winning games we keep playing well.
A.because B.unless C.when D.while
答案 B
解析 考查关联词的用法。句意为：如果我们不能一直打好的话，我们就不能一直赢得比赛。由此而知，此处应用unless.
19.(06辽宁24)
He was about halfway through his meal a familiar voice came to his ears.
A.why B.where C.when D.while
答案 C
解析 when作连词，表“正在这时，突然”，主句中的谓语动词往往是表示状态存在或动作进行的词。
18.(06天津2)
The cost of living in Glasgow is among the lowest in Britain， the quality of life is probably one of the highest.
A.since B.when C.as D.while
答案 D
解析 根据句中among the lowest in Britain和probably one of the highest可知前后的意义存在对比；while用作连词，可用于表示对比或相反的情况，“而；但是”。
17.(06北京34)
He found it increasingly difficult to read， his eyesight was beginning to fail.
A.and B.for C.but D.or
解析 for因为。句意为：因为视力开始下降，他发现读点东西越来越吃力了。
16.(06全国Ⅱ13)
We thought there were 35 students in the dining hall， ，in fact，there were 40.
A.while B.whether C.what D.which
答案 A
解析 while在此表示转折，意为“但是，而”。
15.(06全国Ⅰ33)
Please remind me he said he was going.I may be in time to see him off.
A.where B.when C.how D.what
解析 由句子结构知，此处缺一宾语从句引导词，其在从句中充当状语，故D项首先排除。由后句“我可
以及时为他送行”可知此处应指时间，即“他说要走的时候，请记得提醒我”，故此处用when。
14.(06全国Ⅰ28)
he has limited technical knowledge，the old worker has a lot of experience.
A.Since B.Unless C.As D.Although
解析 本题考查连词的用法。句意为：虽然他的技术知识有限，但这位老工人有很多的(工作)经验。上下句子为转折关系。since表示“既然……”；unless除非……；as当……时；因为……；although虽然……，尽管……，可引导让步状语从句。
13.(07浙江19)
The open-air celebration has been put off the bad weather.
A.in case of B.in spite of C.instead of D.because of
解析 本题考查介词短语。句意为：因为坏天气，露天庆祝活动被取消了。in case of以防万一；in spite of尽管；instead of相反；because of因为。
12.(07四川29)
I’d like to study law at university my cousin prefers geography.
A.though B.as C.while D.for
解析 句意为：我上大学时想学法律，而我表妹想学地理。while为并列连词，意为“而，却”，符合题意。
11.(07湖南21)
Reality is not the way you wish things to be，nor the way they appear to be， the way
they actually are.
A.as B.or C.but D.and
解析 句意为：现实不是你希望事情成为的那样，也不是事情看上去的那样，而是事情本身的样子。本题考查not...but...结构。