例1、_____
he did not know much English，he
got out his dictionary and looked up the word.
A. As B. For C. Since D. Because
答案为A
[解析]for，because和as虽皆可作连词用，都可表示“因为”，但用法有些区别。for引导的分句总是置于另一分句之后，常常对前一分句加以解释，两个分句之间，总是用逗号分开。because引导的原因状语从句时，往往以why问句，语气比较重，传递的往往是对方未了解的新信息。as引导的原因状语从句时，往往是对方也知道的信息。本句是他拿出词典查，显然，“他知道的英语单词不多”，这是明摆着的事，所以用as最恰当。
例2. John became a football coach in
Sealion Middle School ____ the beginning of March.
A. on B.
for C.
with D.
at
答案：D
[解析] at the beginning of “在………的开始”。
例3.
-How far apart do they live?
-_________
I know ,they live in the same neighbourhood.
A. As long as B. As far as C. As well
as D.
As often as
答案为B
[解析] 首先应分析这四个短语的意义区别。这是四个意义完全不同的短语。as long as 意为“只要……就”;as far as意为“到目前为止”；as well as意为“也……”；as often as意为“每次，每当”，根据原题as far as I know意为“就我所知”。
例4.
The speech by the mayor of Shanghai before the final voting for EXPO 2010 is
strongly impressed_________ my memory.
A. to B. over C. by D. on
答案为D。
[解析] impress sb . (with sth.)给某人深刻印象。impress on/upon sb.是固定搭配，给……留下印象。
例5.
The home improvements have taken what little there is_________ my spare time.
A. from
B. in
C. of
D. at
答案为C。
[解析] 这是一个宾语从句，have taken后接感叹句，其正常语序是what little of my spare time there
is.
例6.
The sunlight came in ________the windows in the roof and lit up the whole room.
A. through
B. across
C. on
D. over
答案为A。
[解析] “从窗户缝隙中”要用介词through。through指从里面穿过，透过；across强调从面上横穿，横跨；on“在……面上”；over从一地到另一地；经过一段时间或距离。译文：阳光从屋顶窗户缝隙中照射进来，把整个屋子都照亮了。
例7.
He was about to tell me the secret _______ someone patted him on the
shoulder.
A. as
B. until
C. while
D. when
答案为D。
[解析] as, until, while和when均可表时间，但各有不同：as强调一边……一边;while“在……期间/同时”，表转折；when有两种用法：①当……时，从句动词不限；②就在此时，忽然，等于at that time, suddenly。常用的句式有：be doing…when…(正在做……突?然……);?be about to do…when(正要做……突然……)；常与when连用。译文：他正要告诉我这个秘密，这时，有人拍了拍他的肩膀。
例8.
I know nothing about the young lady ________ She is from Beijing.
A. except B. except for C. except that D. besides
答案为C。
[解析] except后接名词或代词，意思是“除……之外”，表示从整体中除掉部分。except for后接名词或代词，意思是“除……之外”，表示两种事物的类比。如：Your composition is very good, except for
some mistakes.作文和错误是两个概念。except that引导句子。besides后接名词或代词，前边常有other，else等，意思是“除……以外还有”。she is from Beijing是一个句子，只有except that才能引导从句。
例9.
Don't be afraid of asking for help _____ it is needed.
A. unless B. since C. although D. when
答案为D。
[解析] 考连词的用法及区别。答案D容易和B混淆。这里的when=if(如果、倘若)。根据句子的前后关系，应该是未发生的事情，但由when引导的时间/条件状语从句中谓语动词应用一般现在时代替一般将来时。而since(既然)引导的是原因状语从句，其谓语若是将来时，不可用一般现在时代替。译文：如果需要，就别怕向人求助。
例10.
They had a pleasant chat_________ a cup of coffee.
A. for B. with C. during D. over
答案为D。
[解析] 考查介词搭配。to chat over a cup of coffee意思是边喝咖啡边聊天。for和during都有“在……期间”之意，但后边通常加时间；with“随着，用”；over“在(做)……期间，边……边……”。
第三节 巩固练习
Direction:
Beneath each
of the following sentences there are four choices marked A. B. C and D. Choose
the best answer that completes the sentence.
1. The doctor will be free _______.
A. 10 minutes later B.
after 10 minutes C. in 10 minutes D. 10 minutes after
