Answer to Question 6

　　Although an "-ing" verb such as trying can sometimes be used as a noun, the phrase the organism's trying to

　　metabolize in A is unidiomatic because trying is used as the object of organism's. In B, trying that it

　　metabolize is ungrammatical. The noun attempt could follow organism's; also, it would parallel the noun

　　enzymes, and parallelism is needed here because the sentence uses the linking verb are to equate enzymes

　　and attempt. In C and D, however, attempt to try is redundant. Choice E, which says attempt to metabolize, is

　　best. The phrase the chemical irritant is also the most concise and precise conclusion for the sentence

　　157

　　because it clearly refers to the dioxin mentioned earlier.

　　Answer to Question 7

　　The best choice is C. The phrase the more the children should be completed by a parallel phrase that begins

　　with a comparative adjective and a noun phrase, as in the greater their... advantage. Only C correctly

　　completes the structure with a parallel phrase. Choices A. B, D, and E present structures that are unwieldy and

　　awkward in addition to being nonparallel, and that state the relationship between language use and skills

　　development less clearly than C does. Also, underlaying in B and underlay in D are incorrect; the meaning of

　　this sentence requires the present participle of "underlie," underlying, as a modifier of skills.

　　Answer to Question 8

　　Choices A and B incorrectly use the plural verb are with the singular noun equipment. In B, C, and E, when

　　used by does not parallel amount... used by and nonsensically suggests that the people are used by the

　　equipment. D, the best choice, correctly parallels the amount... used by with that used by, in which that is the

　　pronoun substitute for amount. Moreover, D solves the agreement problem of A and B by omitting the to be verb

　　used with visible and placing visible before equipment', the phrase visible equipment is also parallel with

　　unobtrusive equipment.

　　Answer to Question 9

　　Choice E is best. The pronoun that in A and B should be deleted, since the pronoun one is sufficient to introduce

　　the modifier and the sentence is more fluid without that. In B and C, it and that it are intrusive and

　　ungrammatical: the idiom is "believe x to be y." In the context of this sentence, the infinitive to be is more

　　appropriate than the limited present-tense is in referring to an event that occurred long ago but has been

　　discovered only recently. Finally, A, B, and D lack o/and so illogically equate this particular explosion with the

　　whole class of explosions to which it belongs: it is not a type but possibly one of a type.

　　Answer to Question 10

　　A is the best choice. Choices B, C, and D incorrectly omit that after agree; that is needed to create the parallel

　　construction agree that there is waste . . . and that the government... spends. Choice E, though it retains

　　that, is grammatically incorrect: because E starts with an independent rather than a subordinate clause and

　　separates its two independent clauses with a comma, it creates a run-on sentence with no logical connection

　　established between the halves. In B, the agreement ... to the fact is unidiomatic, and B, C, and E alter the

　　sense of the original sentence by saying that voters agree rather than that they may agree.

　　以上就是SAT语法练习题（一）含答案及解析的详细内容，考生可针对文中介绍的方法进行有针对性的备考。