參考答案及解析：

　　1.The correct answer is E

　　Explanation

　　Choice (E) is correct. It avoids the wordiness of the original by deleting the unnecessary phrase “what was,” resulting in the concise “English was spoken.”

　　2.The correct answer is D

　　Explanation

　　Choice (D) is correct. It avoids the error of the original by using the preposition “As” to indicate what the “steps toward … integration” were a part of.

　　3.The correct answer is C

　　Explanation

　　Choice (C) is correct. It avoids the verb tense error of the original. The past tense verb “remained” is not consistent with the present perfect tense verb “have made” and should be changed to the present tense verb “remain.”

　　4.The correct answer is D

　　Explanation

　　Choice (D) is correct. It avoids the awkwardness of the original by using the idiomatic “as … as” construction to compare “Africa” with “Asia.”

　　以上就是這4道SAT語法改進句子練習題的全部內容，非常詳細，后面附有詳細的答案解析。大家在備考自己的SAT語法考試的時候，可以加強練習相關題目。