1、SAT语法题，本人英语基础不太好请解答的详细些麻烦了。

Not many authors have described the effects of environmental pollution as effective as Rachel Carsonm shose work is still a model for nature writters.

as effective as错在哪里

还有a clever designed reservoir也不对么??

2、英语语法 sat

3、鄙人做SAT题中语法部分出现一些问题，求英语牛人相助啊！！！

s home, for a visit, never imaging that five years would pass (before) seeing Derek again.(08050629)

应改为he saw。但是不明白原句为什么不对，before即可为adv,又可为prep,还可为conj.，为什么这里要用conj而不是prep呢？

2、Determined to make a name for herself as a writer of short stories, Helen never submits anything to an editor until （revising） it several times.（09050625）

应改为Helen has revised。问题和1、类似，until 可为conj和prep，怎么区别呢？？？

3、(Opposite to) most people I know, Annie, a good photographer herself, actually enjoys seeing the photographs that her friends take on their vacations.（06050626）

应改为Opposite with,但是两者有何区别呢？

4、Chess players find that playing against a computer is helpful (to improve) their skills, even though no chess-playing computer has yet won a championship.（OC010720）

应改为of improving。 还是不知道区别。

5、Annual visitors to New York City's Central Park number almost ten times (that of) Mount Rushmore.(07100526)

应改为those to。这道题题意不是很明白，帮忙分析下。麻烦了。

悬赏不是很高，但我也是心有余而力不足啊，希望高人捧场！！！", 'contentText': "括号中的部分为原句中的错误部分！

1、Quincy took Dan to Derek's home, for a visit, never imaging that five years would pass (before) seeing Derek again.(08050629)

应改为he saw。但是不明白原句为什么不对，before即可为adv,又可为prep,还可为conj.，为什么这里要用conj而不是prep呢？

2、Determined to make a name for herself as a writer of short stories, Helen never submits anything to an editor until （revising） it several times.（09050625）

应改为Helen has revised。问题和1、类似，until 可为conj和prep，怎么区别呢？？？

3、(Opposite to) most people I know, Annie, a good photographer herself, actually enjoys seeing the photographs that her friends take on their vacations.（06050626）

应改为Opposite with,但是两者有何区别呢？

4、Chess players find that playing against a computer is helpful (to improve) their skills, even though no chess-playing computer has yet won a championship.（OC010720）

应改为of improving。 还是不知道区别。

5、Annual visitors to New York City's Central Park number almost ten times (that of) Mount Rushmore.(07100526)

应改为those to。这道题题意不是很明白，帮忙分析下。麻烦了。

悬赏不是很高，但我也是心有余而力不足啊，希望高人捧场！！！", 'supplyRich': '

4、高分求sat语法题！！在线等！！解释详细完整的话再加分！

1。Rescuers reached the {skiers,found them apparently unharmed, but they nevertheless were taken} to the hospital for observation.

B.skiers,finding them apparently unharmed, and nevertheless taking them

D.skiers and found them apparently unharmed but neverthelss took them

我选B，答案D.但是sat中，一句话中不是不能有2个连词吗？（难道记错了？），D里，又是and,又是but，怎么会对？

2.Sugar alcols-sugar substitutes used in various brands of sugar-free chewing gum-do not cause tooth {decay,however,they contain calories}.

E.decay but do contain calories.

我选原句，答案E.第一我觉得do强调的多余、改原句意，第二原句有什么问题？

3.In 1987 a Soviet icebreaking ship helped free three gray whales that {had become trapped} in the Arctic ice after they {had swam} into the coastal waters of Alaska to feed.

我选had become trapped错，答案是had swam错。但是，不是先swam into ,再trapped的吗？那就应该是had swam 和became trapped啊。为什么答案是改had swam?

4.The Eactrian camel is well adapted to the extreme climate of its native Mongolia, having thick fur and underwool that keeps it warm in winter {and also} insulate against summer heat.

我想知道and also可以连用吗？also是连词？副词？怎么加了and?

5.Seventy-five percent of the apples sold in NYC come from the WC or overseas, 『even though』 NYC produces more than enough apples to meet the city\'s need.

想知道even though什么词？连词？副词？怎么能在前面加逗号？

另外，sat里面不是规定，副词前只用；或。连接吗？可是为什么thereby,thus还有好多其它副词都有......，副词＋doing...的用法？e.g. I am happy, thus doing sth.。请具体把所有起连词作用的副词的各种用法列一下。如thereby, thus ,therefore。。。。。。尤其是能跟，加doing的！！！这个问题麻烦讲详细一点。

6。{A significant factor} to include in the budget when {buying} a car are the costs of fuel and maintenance and the insurance payments.

我知道a significant factor应改成Sigificant factors，但是buying为什么对？

有个经典例子：Mr Hanson proudly demonstrated his company\'s latest cellphone, a model that flashes the time in color-coded numerals （when pressing a button）

. 就是pressing a buttoon 不是主语model发出的动作，所以不对。

那我这道题里，factors是主语，factors也不是buying的动作发出者啊。为什么这里buying对的？

7. in particular的用法怎么样？

"...，in particular doing"可不可以？

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