在文章中间：(1)承接上文 (2)开启下文(引出下文) (3)承上启下(过渡) (4)为后文作铺垫；标志思路、为下文作铺垫、埋下伏笔等作用。
在文章结尾：总结上文、全文、照应开头、独立成段，使文章戛然而止，意味绵长，发人深思、卒章点题，意味深长等作用。
10. -- How do you ____ we go to Beijing for our
holidays?
-- I think we'd better fly there. It's much more
comfortable. (2004福建)
A. insist B. want
C. suppose D. suggest
[解析]选A 本题考查insist表示“坚持”时所带的
宾语从句用虚拟，即：insist that sb. (should) do sth. 所以
本题选A。
9. -- Don't you think it necessary that he ____ to
Miami but to New York?
-- I agree, but the problem is ____ he has
refused to. (2005 江苏)
A. will not be sent; that
B. not be sent; that
C. should not be sent; what
D. should not send; what
[解析]选B 本题既考查了虚拟语气的用法，又考
查了表语从句的用法。由necessary引导的主语从句或宾
语从句，需要用shouId do，而他是要“被派往”迈阿密，所以
第一空用(should)not be sent，而第二空在be动词之后需
要用一个表语从句，由于句子结构完整，所以用that。
8.( ) If I ____ plane to do anything I wanted to, I'd
like to go to Tibet and travel through as much of
it as possible. (2005湖北)
A. would B. could
C. had to D. ought to
[解析]选B 本题考查if引导的虚拟语气结构。从
I'd like to go...判断，本句为与现在事实相反，故选B。
7. -- Do you know where David is? I couldn't find
him anywhere.
-- Well. He ____ have gone far - his coat's
still here. (2005湖北)
A. shouldn't B. mustn't
C. can't D. woldldn't
[解析]选c同第6题，表示否定的推测。
6. I ____ have been more than six years old when
the aecident happened. (2005 天津)
A. shouldn't B. couldn't
C. mustn't D. needn't
[解析]选B“情态动词 + 完成时态”用来表示对过
去某一事实的假设或推测。尤其用来表示否定的推测则
用"can't / couldn't have done"。本句译为：当事故发生时
我不可能大于六岁。
5. He ____ have completed his work; otherwise,
he wouldn't be enjoying hirnself by the seaside.
(2005北京)
A. should B. must
C. wouldn't D. can't
[解析]选A 根据下文“否则他在海边没法玩得痛
快。”可以推出上一句“他本应该要完成他的工作。”should
have done表示后悔或责备，意为“本应该做了(但事实上
没做)”。
4. -- I'm afraid Mr. Wood can't see you until 4
o'clock.
-- Oh, ____ I won't wait. (2005 浙江)
A. no doubt B. after all
C. in that case D. in this way
[解析]选C in this / that case (要是这样／那样的
话)。
3.( ) I always take something to read when I go to the
doctor's ____ I have to wait. (2005 全国II)
A. in case B. SO that
C. in order D. as if
[解析]选A in case引导句子或单独使用，上面句
子中in case I have to wait “以防我去等”，使上下文逻辑通
顺。
2. Mum is coming. What present ____ for your
birthday? (2005 福建)
A. you expect she has got
B. you expect has she got
C. do you expect she has got
D. do you expect has she got
[解析]选C do you expect 通常被看作插入语，而不
写成Do you expect what she has got，所以后面的宾语从句
仍用陈述语序。