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1.(全国Ⅰ31)
Between the two generations， it is often
not their age， their education
that causes misunderstanding.
A.like B.as C.or D.but
答案 D
解析 本题结合强调句型考查并列连词词组not...but...不是……而是……，句中该并列连词词组连接主语。
2.(全国Ⅱ8)
he
had not hurt his leg，John
would have won the race.
A.If B.Since C.Though D.When
答案 A
解析 本题为与过去事实相反的虚拟条件句。
3.(北京31)
You have failed two tests. You’d better start
working harder， you won’t pass
the course.
A.and B.so C.but D.or
答案 D
解析 句意为：你已经两次考试不及格了，你最好更加努力学习，否则你这门课程还会不及格。or否则。
4.(北京33)
Leave your key with a neighbor you lock yourself out one day.
A.ever since B.even
if C.soon after D.in case
答案 D
解析 A项意为“自从……以来”，B项意为“即使”，C项意为“不久之后”，D项意为“以防；以免”。句意为：留一把钥匙给邻居，以免有一天你把自己锁在门外。
5.(上海25)
Leaves are found on all kinds of trees，but they differ
greatly size and
shape.
A.on B.from C.by D.in
答案 D
解析 differ in在……方面不同；differ from与……不同。
6.(上海38)
Small sailboats can easily turn over in the
water they are
not managed carefully.
A.though B.before C.until D.if
答案 D
解析 句意为：如果小帆船没有被仔细掌控好的话，那么在水中就很容易被打翻。if如果，引导条件状语从句。
7.(天津8)
It is difficult for us to learn a lesson in life we’ve actually had that
lesson.
A.until B.after C.since D.when
答案 A
解析 句意为：对我们来说在生活中得到启示是很难的，直到我们真正得到了那一启示。A项为“直到”；B项为“在……以后”；C项为“自从……以来”；D项为“当……的时候”。
8.(安徽21)
The field research will take Joan and Paul about
five months; it will be a long time we meet them again.
A.after B.before C.since D.when
答案 B
解析 本题考查before引导的时间状语从句的用法。主句为将来时态，从句用一般现在时态表示将来。
9.(江西23)
Scientists are convinced the positive effect of
laughter physical and
mental health.
A.of; at B.by;
in C.of; on D.on; at
答案 C
解析 be convinced of sth.坚信……；the effect on
sth.对于……的影响；由此搭配形式可知C项正确。
.(湖北26)
People try to avoid public transportation delays
by using their own cars，and
this creates further problems.
A.in short B.in
case C.in doubt D.in turn
答案 D
解析 A项“简言之”；B项“以防万一”；C项“怀疑”；D项“反过来”。句意为：人们想开自己的车来避免交通耽搁，这反过来却导致了进一步的问题。
11.(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
答案 C
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。
12.(四川29)
I’d like to study law at university my cousin prefers
geography.
A.though B.as C.while D.for
答案 C
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。
13.(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
答案 D
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。
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