新概念英语第二册21课课后练习答案

如题所述

Lesson 21
1. c
根据课文第3-4行Last year, however, it came into use, 只有c. came into use recently 比较接近课文的实际内容,而其他3个选择都不符课文内容。
2. d
根据课文第8行…but I am determined to stay here, 只有d. has refused to leave his house 与课文内容相符,其他3个选择都与事实不符。
3. c
只有选c. can hear 才能使这个句子同前一句Passing planes can be heard night and day 的含义相同,只是语态不同。 而其他3个选择a. can heard, b. can to hear, d. can be heard 都不符合语法,在意思上都讲不通。
4. d
只有d. possible 才能使句子同前一句It couldn't be used then 意思最接近。a. able (能)需要人作主语,本句的主语是it 形式主语;b. allowed(允许)不符合题目的意思, c. impossible(不可能的)与句子意思相反。
5. a
前面句子Over a hundred people must have been driven away 中的must 表示说话人的一种主观推测。 b. I’m sure(我确信) 语气比较肯定,不表示推测;c. Certain(肯定的)是形容词,缺主语和谓语,不符合语法和题目意思。; d. Of course(当然) 表示“肯定”的意思,也不够准确; 只有a. I think(我想,我认为) 表示推测,所以应该选a.
6. c
只有c. are some left 才能使这个句子比较接近前一句I am one of the few people left,因为few(少数几个)同some(一些)意思比较接近, a. are none left(一个没剩)不等于the few.
b. is one left(剩下一个)也不等于the few;
d. are a lot left(剩下很多)与the few 意思相差悬殊.
所以选c.
7. b
这是一个疑问句,需要主谓倒置语序。
a. have you been offered, C. you have offered, d. they offered you 这三个选择都是陈述句语序,只有b. have you been offered 是疑问句语序,因此选b.
8. b
只有b. give(给)出同前面的动词offered 词意思相近, 而a. serve(服务,服侍), c. take(拿,带), d. make(做,制造) 这3个选择都与offered 意思不同。
9. a
b. number 只能修饰人,不能修饰不可数名词money, c. some不符合语法,意思不成立; d. piece 只能修饰不可数名词,但是不能修饰money.只有a. amount(很多,一大笔)表示金额,可以修饰money.
a large amount of很多,一大笔,表示金额,a number of是只用于可数名词
10. d
只有d. am going to 才比较接近前一句I am determined to stay here.(我决定留在这里)的含义。其他3个选择中:a. am will to 不符合语法; b. want to(想要)与be determined to 的含义有些差距;c. may (可以) 词意思更不正确。
11. c
只有c. Perhaps 才能与前一句中的…they are probably right(……他们可能是对的)意思相吻合,表示“可能”,“也许”(不肯定的推测), 而a. Of course(当然), b. It’s certain( 肯定), d. It’s sure(一定) 这3个选择都带有肯定的意思,因此应该选c.
12. c
只有c. correct(对的,正确的)这个句子才通顺,而a. just(公正的),b. fair(公平的)与d. equal(平等的,相等的)这3个选择都不符合题目的意思,所以选c.
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第1个回答  2012-03-10
Lesson 21
1. c
根据课文第3-4行Last year, however, it came into use, 只有c. came into use recently 比较接近课文的实际内容,而其他3个选择都不符课文内容。
2. d
根据课文第8行…but I am determined to stay here, 只有d. has refused to leave his house 与课文内容相符,其他3个选择都与事实不符。
3. c
只有选c. can hear 才能使这个句子同前一句Passing planes can be heard night and day 的含义相同,只是语态不同。 而其他3个选择a. can heard, b. can to hear, d. can be heard 都不符合语法,在意思上都讲不通。
4. d
只有d. possible 才能使句子同前一句It couldn't be used then 意思最接近。a. able (能)需要人作主语,本句的主语是it 形式主语;b. allowed(允许)不符合题目的意思, c. impossible(不可能的)与句子意思相反。
5. a
前面句子Over a hundred people must have been driven away 中的must 表示说话人的一种主观推测。 b. I’m sure(我确信) 语气比较肯定,不表示推测;c. Certain(肯定的)是形容词,缺主语和谓语,不符合语法和题目意思。; d. Of course(当然) 表示“肯定”的意思,也不够准确; 只有a. I think(我想,我认为) 表示推测,所以应该选a.
6. c
只有c. are some left 才能使这个句子比较接近前一句I am one of the few people left,因为few(少数几个)同some(一些)意思比较接近, a. are none left(一个没剩)不等于the few.
b. is one left(剩下一个)也不等于the few;
d. are a lot left(剩下很多)与the few 意思相差悬殊.
所以选c.
7. b
这是一个疑问句,需要主谓倒置语序。
a. have you been offered, C. you have offered, d. they offered you 这三个选择都是陈述句语序,只有b. have you been offered 是疑问句语序,因此选b.
8. b
只有b. give(给)出同前面的动词offered 词意思相近, 而a. serve(服务,服侍), c. take(拿,带), d. make(做,制造) 这3个选择都与offered 意思不同。
9. a
b. number 只能修饰人,不能修饰不可数名词money, c. some不符合语法,意思不成立; d. piece 只能修饰不可数名词,但是不能修饰money.只有a. amount(很多,一大笔)表示金额,可以修饰money.
a large amount of很多,一大笔,表示金额,a number of是只用于可数名词
10. d
只有d. am going to 才比较接近前一句I am determined to stay here.(我决定留在这里)的含义。其他3个选择中:a. am will to 不符合语法; b. want to(想要)与be determined to 的含义有些差距;c. may (可以) 词意思更不正确。
11. c
只有c. Perhaps 才能与前一句中的…they are probably right(……他们可能是对的)意思相吻合,表示“可能”,“也许”(不肯定的推测), 而a. Of course(当然), b. It’s certain( 肯定), d. It’s sure(一定) 这3个选择都带有肯定的意思,因此应该选c.
12. c
只有c. correct(对的,正确的)这个句子才通顺,而a. just(公正的),b. fair(公平的)与d. equal(平等的,相等的)这3个选择都不符合题目的意思,所以选c.
第2个回答  2012-02-08
我只能告诉你难点练习的答案。
B:1)home;2)houses;3)house;4)home;
选择:B D D B B D B B C D C C

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