英语语法达人请进，左边是正确答案，横线上的是我错选的答案，请给出具体原因，以题号为准 ，不胜感激流涕
7. 因为that 代表The number of registered participants 。 the number 是单数，如果是复数，用those。A 项是今年的马拉松参赛人数是去年的马拉松一半。显然少了意思，应该是去年马拉松参赛人数的一半。
8，for后面显然不能加整个句子，只能加一个成分。因此只有BD可选。B是指为了某种目的。因此更符合题意。
9 因为句子里不需要谓语成分，且又是englishman 的主动的行为，所以选giving
10。不知道原因。感觉C项不正确。
that coat is too heavy for such a mild day.
C3. The school board listened quietly as John read the demands that his followers ____B____ for.[A] be demonstrating
[B] demonstrate
[C] had been demonstrating
[D] have demonstrated
John读demands是过去时，他的跟随者证明这些demands要比John先一个时态，所以是过去完成时。
C4. Ted has told me that he always escapes ____B____ as he has got a very fast sports car.
[A] to fine
[B] to be fined
[C] being fined
escape doing sth. 逃脱做某事
D6. Prof. Lee’s book will show you ____C____ can be used in other contexts.
[A] that you have observed
[B] that how you have observed
[C] how that you have observed
[D] how what you have observed
what you have observed指代一个名词，一个事物，用that就变成从句了，而这个从句又没有先行词，所以不成立。”这本书会告诉你如何把你所观察到的东西运用在其他地方。“
B10. Experts say walking is one of the best ways for a person to ____C____ healthy.
[A] preserve
[B] stay
stay healthy 保持健康，有点固定搭配吧。
D15. A really powerful speaker can ____C____ the feelings of the audience to the fever of excitement.
[A] work out
[B] work over
[C] work at
[D] work up
真正有感染力的演讲家会把观众的感情”激发“成什么什么。纯粹考词组意思。
A16. Before the students set off, they spent much time setting a limit ____C____ the expenses of the trip.
[A] to
[B] about
[C] in
[D] for
set a limit to / set limits to 对…加以限制
B17. According to the psychoanalyst Sigmund Freud, wisdom comes from the ____C____ of maturity.
[A] fulfillment
[B] achievement
[C] establishment
[D] accomplishment
大概是弗洛伊德的名句本身就用这个词吧。。。智慧源于成熟。
A18. From the tears in Nedra’s eyes we can deduce that something sad ____C____.
[A] must have occurred
[B] would have occurred
[C] might be occurring
[D] should occur
从他的眼泪我们可以推断出，一定发生了些悲伤的事。A更符合这个语言环境。
D20. Hardly a month goes by without ______B__ of another survey revealing new depths of scientific illiteracy among U.S. citizens.
[A] words
[B] a word
[C] the word
[D] word
美国公民科学知识匮乏的现象日益严重，这种调查报告几乎月月都有。双重否定。我也不知道为什么。。反正用word就行了。。。
D24. There is no reason they should limit how much vitamin you take, _____B___ they can limit how much water you drink.
[A] much more than
[B] no more than
[C] no less than
[D] any more than
他们没有理由限制你服用多少维生素，就像他们不能限制你喝多少水一样。（any more than实际上是前后两部分进行比较的一种用法）
B26. Most electronic devices of this kind, _____C___ manufactured for such purposes, are tightly packed.
[A] that are
[B] as are
[C] which is
[D] it is
A的话前面不能有逗号，C的话是单数，主语是复数，所以选B...
25、27不知道怎么说，你问问别的老师或同学吧。。。
===========================================================
谢谢victorcuper的指点~~17、20题我确实不知道这些词的涵义唉，在此学习了！至于18题，我还以为关键是时态呢 ><
苦涩蓝山有一些说的不对。
ta对17题的解释太不负责任了。achieve表示通过一定的努力后获得，在这里意思最准确。
18题，确实是发生了悲伤的事，但这样并没有解答出为什么是A。关键在于，occur是一个瞬间动词i，所以不能用occuring。
20题，苦涩蓝山没说清楚。word在这里是不可数名词，表示言论、消息。
至于ta没有解答的25题和27题：
25：“尽管在旧金山长大”，A选项是被动语态，被抚养大。B不能选，是因为grow up才是长大，grow不是，而且grow是主动语态。
27题，我强烈怀疑你抄错题了。不管按照你的答案还是参考答案都解释不通。麻烦你再看看。
相关视频
英语专业人士请进 语法
※Admired by everybody, dozens of letters reached the veteran soldier.(这句话听起来好象是信件被赞扬。)※Sitting under an apple tree one night, an idea came to Newton.(这句话听上去好象是某种思想坐在树下。)关于“悬垂分词”这条语法规则也有例外情况。下面几种情况中的分词(短语)，不...
英语达人请进(有关语法:present perfect tense 和 past tense)
现在完成时表示过去发生或完成的某一动作对现在造成的影响或结果 过去时仅仅陈述事情发生在过去。例如： I have finished my homework. 我已经完家庭作业了（比方说，你妈妈叫你别看电视了，去做作业。你用现在完成时对你妈说这句话，潜在标达，我完成家庭作业了，我现在可以看电视。 这是你完成家庭...
英语的语法口诀
1、英语的词类：句子要由词组成，英语词类有十种：句中成分用实词，名、代、动、副、数、形容：冠、介、连词和感叹， 虚词附加或沟通。词类功能掌握了，造句之时好运用。2、介词顺口溜：in 在??里，out 在??外， 在旁边的是 beside， 靠近的为 by。 on 在??上， under 在??下， above 在...
英语语法高手请进
+ 代词”的表语从句。因为它是表语从句，而非定语从句。3. 这是定语从句的特殊规定。如果先行词是those且指人时，此时定语从句的关系代词一般只能用who.可以理解成：those who = those people who 先行词可以是名词，也可以是代词，甚至可以是一个句子，而those恰恰就是代词。参考资料：英语牛人团 ...
