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20. I really wonder ______ he has posted me many parcels _____ we worked together .

  A. how ; after   B. why ; when  C. when ; before  D. why ; since

答案是D项。英语中的连词since有这样的特性:终止其后从句中的延续性的谓语动词的动作。第二个空白处填入since之后,这个从句的意思是:自从我们不在一起工作起。此外,since还可使其后从句里的非延续性的谓语动词延续。例如:It is 15 years since he joined the Army . (他参军已经十五年了。)

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19. It is a rule in his family that ______ comes home earlier should cook the dinner for the family .

A. Anybody  B. who  C. who that   D. whoever

答案是D项。whoever有两个词义,(1)no matter who,在这种用法时引导一个让步状语从句,如:Whoever ( = No matter who ) it is , I do not want to see them . (无论他是谁,我都不想见。),又如:The business would be a success , whoever ( no matter who ) owned it . (这个企业准能兴旺发达,甭管谁是它的主人。);(2)anybody / that,在这种用法时,它连接一个名词性从句,在本题中它连的是主语从句,又如:I will take whoever ( anybody that ) wants to go to that beautiful park . (我要带任何想去那个美丽公园的人去那里。)在这一例句中whoever连接的是一个宾语从句。

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18. The duties of a policeman are _____ than ____ .

A. dangerouser ; a teacher         B. more dangerous ; a teacher

C. greater danger ; those of a teacher     D. more dangerous ; those of a teacher

答案是D项。英语中由构词法派生出的形容词或副词比较级与最高级一律前面加more各the most构成。dangerous是由danger派生出的形容词,因此其比较级是more dangerous ; 在比较句中,一定要使比较的东西是一致的。为了避免重复,需比较的对象如果是单数,应该使用that of…代替,如果需比较的对象是复数,则用those of …,请看以下两个例句,并理解上述说法:The climate in Florida is as mild as in California . (佛罗里达州的气候与加州的气候一样暖和。) Classes in universities are more difficult than those in colleges . (大学本科的课程比大学专科的课程更难。)

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17. The black horse is _____ of the pair .

   A. the strongest   B. the stronger   C. the strong    D. quite strong

答案是B项。英语表示"两里择一的那一个更…"的名词前的比较级前面应该使用定冠词the。pair的词义是"一对"或"一双",此处的the pair 的词义是two horses fastened side by side to a cart (两匹套在车辕的马)。因此,此处应该使用the stronger 。

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16. ______ professional violinist practises for several hours a day , but ______ violinist has his own way of playing the Beethoven concert .

A. Each , every   B. Every ; each   C. All ; every    D. Either ; every

答案是B项。虽然every与each在汉语中的词意是:"每一个",但这两个代词的内涵不完全一样。every与all含义很接近,如:He has read every book / all books on the subject . (有关这个科目的书籍他全都读过了。)英文中常用every进行概括,强调事物或人的总体性,而each则表示个别概念,当我们说each violinist时,我们想到的是每个不同的人做着不同的事。又如:We want every child to succeed , however each child will find his or her own personal road to success . (我们希望每个孩子都能成功,然而每个孩子将会找到他或她个人的成功之路。)

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15. Mr. Zhang gave all the textbooks to all the pupils , except _____ who had already taken them .

  1. these    B. ones    C.the ones     D. the others

答案是C项。one本来是数词,但也可用作不定代词,代替前面刚提到的一个东西或人,避免重复前面刚提到的名词,有时one可以有自己的定语或冠词,甚至可以有复数形式,如:I don't like these pink shirts . Will you please show me the white ones ? (我不喜欢这些粉色的衬衣,请您把那些白色的衬衣拿给我看看好吗?)

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14. Besides Tom , ______ Crosettes have two other sons , ______ of whom are all interested in making model planes .

A.不填;two  B. 不填;the two  C. the ; three  D. the ; the three

答案是D项。在英语的姓氏前使用定冠词,表示的是这个姓氏的一家人或这个姓氏的夫妇;"the + 数词 + of + 代词"这一结构表示该代词的总数是前面的数词表示的数量,而"数词+of+代词"结构中的代词表示的量肯定大于前面数词表示的数量,试比较:the five of us (我们这五个人,us表示的就是五个人)而five of us (我们中的五个人,us表示的数量肯定要多于五个人)。

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13. Shortly after the accident , two ______ police were sent to the spot to keep order .

 A. dozens of  B. dozens  C. dozen of  D. dozen

答案是D项。英语中一些表示数字的名词的前面如果用了数词,这些名词必须是单数形式,如dozen(一打),score(二十)和head (头) 等,例如:另外两打鸡蛋another two dozen eggs ; 八十七年前four score and seven years ago ; 五十五头牲口fifty-five head of cattle 。但是如果这些名词用来虚指某些可数名词时,这些名词呈复数形式,其后更加上介词of例如:dozens of pencils (几十支铅笔)和scores of tame birds (几十只家禽)。

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12. My dictionary ________ . I have looked for it everywhere but still ______ it .

A. has lost ; do not find   B. is missing ; do not find 

C. has lost ; have not found    D. is missing ; have not found

答案是D项。lose是个及物动词,如果要表示某物丢失了,只能用被动语态。A项与C项使用的都是其主动形式。missing是形容词,其词义是:lost ; not to be found (丢失了的),据此,第一空缺处应填入is missing。根据语境,第二个空缺处应填使用现在完成时的否定形式,因为它可以表示目前还未发生的动作。

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11. The news about the terrible flood there greatly discouraged ______ these for a sight-seeing .

A. us from going    B. us to go    C. our going     D. our to go

答案是A项。discourage与encourage互为反义词。英语中说"鼓励某人做某事"时使用encourage sb to do sth , 但如果要表示"使某人没勇气做某事"时,不能想当然的以此类推:discourage sb to do sth , 这是不符合英语习惯的错误表达方式,其正确形式是:discourage sb from doing sth 。

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