[求助]大家帮帮忙，请教几个问题！

1.Building large new hospitals in the bistate area would constitute a wastful use of resources , (on the basis of avoidance of duplicated facilities alone .)

A on the grounds of avoiding duplicated facilities alone

B if only because the duplication of facilities should be avoided

为什么要选B啊，A不对么？B没有改变原来的语气么？

2.The spraying of pesticides can be carefully planned , but accidents , (weather conditions that could not be foreseen , and errors often cause much larger deposits of spray than they had )anticipated .

A unforeseeable weather conditions ,and pilot errors often cause much larger deposits of spray than they had

为什么不可以这么改呢？答案没有改动原文

3. The suspect in the burglary was advised (of his right to remain silent , told he could not leave , and was) interrogated in a detention room.

A of his right to remain silent , told he could not leave , and

B that he had a right to remain silent , could not leave , and was

B为什么不可以呢？A中told 后面不少that么/

4.Studies show that young people with higher-than-average blood preassure( and their families have history of high blood pressure )are more likely than orhers to develope a severe form of the condition.

A whose families have a history of high blood pressure

答案并没有改，但是我怎么觉得句子结构不是很对呢？A对么？

5.Executives and federal officials say that the use of crack and cocaine is growing rapidly among workers , （significantly compounding the effects of drug and alcohol abuse , which already are a cost to business） of more than $100 billion a year .

A significantly compounding the dffects of drug and alcohol abuse , which already cost business

答案中的which 指代的是谁啊，使cost 用复数

6.The human growth hormone , made by the pituitary gland , is secreted （during sleep in higher concentrations than when awake） .

A in higher concentrations during sleep than during waking hours

B in higher concentrations when asleep than when awake

A为什么对啊？B不行么？

弱弱的问题麻烦大家了，可能有的问题以前的帖子会有 ，但实在没找到，就烦劳大家了，谢谢！！

1-OG补充29

Choices A and B are unclear and imprecise: on the basis of avoidance… and on the grounds of avoiding … do not present reasons that support the statement in the main clause, and alone seems illogically to modify duplicated facilities. Also, duplicated facilities in A, B, and C identifies the problem with the facilities that have been duplicated, not with the act of duplicating facilities; for example, C apparently advises people to avoid facilities that have been duplicated. In D,  while establishes no logical relation between the main clause and the rest of the sentence. E is best: if only because introduces a reason for the preceding statement, and the remainder of the answer choice is logically worded. The question is difficult.

2-OG补充33

Choice A, C, and E are faulty because the pronoun they has no logical noun to which it can refer; also could not be foreseen in A seems to describe specific weather conditions in the past, not ones that are still unforeseeable and so continue to affect spraying. B corrects both problems. C contains the unattached they and inflates cause to are the cause of; moreover, by changing cause from a verb to a noun, C states that all three factors acting together constitute the one and only cause of excessive deposits. The initial phrase of D is less compact and idiomatic than that of B. This question is difficult.

3-OG补充42

The best answer will exhibit parallelism. Choice B correctly forms a parallel structure: was advised…, told…, and interrogated… Because all three verbs are governed by the was in line 1, the was after and in choice A is not merely unnecessary but actually wrong because it disrupts the parallel. Choice C is wordy and ungrammatical: the syntax forces was advised rather than was to govern all three elements, a construction that becomes impossible with was advised…interrogated. A similar misconstruction in D produces the misstatement that the suspect was advised that he… was interrogated. E forms a list of non parallel elements; placing and after silent and dropping the commas would make E grammatical but no less wordy. This question is very difficult.

4-A中and前后结构不平行，错。

5-OG119

Choice B, the best answer, uses clear and concise phrasing to state that it is the effects of drug and alcohol abuse that already cost business the sum mentioned. In A, to business is awkwardly and confusingly inserted between cost and the prepositional phrase that modifies it, and are already a cost to business is wordy and awkward compared to cost business. In C, already with business costs of... is awkward and unclear, failing to specify that those prior effects generate the cost. Choices D and E produce faulty constructions with the phrase significant in compounding, which cannot grammatically modify the verb form is growing

石兄这可是名言啊!!

对了!! 建议楼主把题号打上, 以后要是有很多问题, 请一个一个发, 方便后人检阅参考......

不错, 经典解释. OG风范.