下面为大家整理的是关于2013年8月25日—9月6日的SAT语法改进句子练习题，共6道。SAT语法改进句子题目要求考生在语法知识和逻辑思维能力两个方面都有所掌握，所以需要大量的练习。下面大家就和天道小编一起来看看这些题目的详细内容吧。

1.The gong, believed to have originated in Western Asia, reached China in the sixth century, where it continues to be used for a wide range of purposes, including as a military signal, a rhythmic accompaniment for vocal performance, and a ritual instrument.

(A) including as

(B) which include

(C) which includes

(D) including

(E) they include as

2.In Costa Rica, coffee, from the highlands, and bananas, produced mainly in the Caribbean lowlands, as the most important crops, they account for nearly half the total value of all exports.

(A) as the most important crops, they account

(B) as the most important crops, which account

(C) are the most important crops, accounting

(D) are the most important of their crops by accounting

(E) have been the most important crops, which accounts

3.There are many famous quotations previously credited to “Anonymous,” researchers have discovered that they were in fact written by female authors.

(A) There are many famous quotations previously credited to “Anonymous,” researchers have discovered that they were in fact written by female authors.

(B) Many famous quotations that were in fact written by female authors were previously credited to “Anonymous” and researchers discovered this.

(C) Researchers have discovered many famous quotations that were previously credited to “Anonymous,” they were in fact written by female authors.

(D) Researchers have discovered that many famous quotations previously credited to “Anonymous” were in fact written by female authors.

(E) The discovery of many famous quotations previously credited to “Anonymous” but in fact written by female authors were made by researchers.

4.New analyses of a fossil suggest winged insects having possibly emerged as early as 400 million years ago.

(A) suggest winged insects having possibly

(B) suggest that winged insects may have

(C) suggesting that winged insects, they may have

(D) that suggests winged insects as having possibly

(E) that suggest winged insects to have possibly

5.According to the study, personality traits may vary as much from one dog to another as from one person to another.

(A) as

(B) as it is

(C) as when they are

(D) than

(E) than they do

6.Althea Gibson, the first African American tennis player to be recognized as a world champion,beginning to play amateur tennis in the 1940s.

(A) beginning to play

(B) began playing

(C) and she began playing

(D) she began to play

(E) she had begun playing

参考答案及解析：

1.The correct answer is A

Explanation

Choice (A) is correct. It avoids the errors of the other options by correctly using the preposition “as” to introduce the “wide range of purposes” for which the gong is used.

2.The correct answer is C

Explanation

Choice (C) is correct. It avoids the error of the original by providing a main verb (“are”) to agree with the subject of the sentence, “coffee … and bananas.”

3.The correct answer is D

Explanation

Choice (D) is correct. It avoids the comma splice error of the original by combining the two independent clauses that were improperly joined by only a comma (“There are many famous quotations previously credited to ‘Anonymous’” and “researchers have discovered that they were in fact written by female authors”) into one sentence consisting of a main clause (“Researchers have discovered”) and a dependent clause (“that many famous quotations previously credited to ‘Anonymous’ were in fact written by female authors”).

4.The correct answer is B

Explanation

Choice (B) is correct. It avoids the error of the original by replacing the awkward and wordy “suggest winged insects having possibly” with the more precise and idiomatic “suggest that winged insects may have.”

5.The correct answer is A

Explanation

Choice (A) is correct. It avoids the errors of the other options by using the idiomatic “as” to complete the phrase “as much … as.”

6.The correct answer is B

Explanation

Choice (B) is correct. It avoids the sentence fragment error of the original by providing a main verb (“began”) for the subject of the sentence, “Althea Gibson.”

以上就是这6道SAT语法改进句子练习题的全部内容，非常详细，后面附有详细的答案解析。大家在备考自己的SAT语法考试的时候，可以加强练习相关题目。