25.(04四川27)
you call me to say you’re not coming，I’ll see you at the theatre.
A.Though B.Whether C.Until D.Unless
答案 D
解析 unless=if...not。
B组
24.(05安徽22)
You must keep on working in the evening， you are sure you can finish the task in time. A.as B.if C.when D.unless
解析 unless引导一个状语从句，意思同if...not...如误选C，是因为没有正确理解句子的意思。句意为：你必须在晚上继续工作，除非你确信会按时完成任务。
23.(05北京22)
-Somebody wants you on the telephone.
- no one knows I’m here.
A.For B.And C.But D.So
答案 C
解析 根据题意“有人打电话找你”“但是没有人知道我在这儿(怎么会打电话呢？)”可知上下句为转折关系。故选C。
22.(05安徽29)
That was really a splendid evening.It’s years I enjoyed myself so much.
A.when B.that C.before D.since
解析 句意为：那确实是一个很精彩的夜晚。我有很多年没玩得这么开心了。since表示“自从”意思时，其后面的谓语动词若是延续性动作动词，要从动作结束时算起，即:我有数年没有玩得这么痛快了。
21.(05江西32)
Your uncle seems to be a good driver； ，I wouldn’t dare to travel in his car.
A.even so B.even though C.therefore D.so
答案 A
解析 上句“你叔叔好像是个好司机”，下句“我不敢坐他的车”，意思有转折，因此应该用表示转折的词。even so虽然如此，even though即使；therefore因此；so那么，如此。
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
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
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
解析 while在此表示转折，意为“但是，而”。