第一部分：单项选择 (共15题，每题3分)

旨在考察对特殊句式（倒装、强调、省略、虚拟）的敏感度。

1. Not until the late 19th century _______ to realize that certain diseases are caused by bacteria.
   A. scientists did begin
   B. did scientists begin
   C. scientists began
   D. had scientists begun

2. _______ for the timely warning, we would have been caught in the flash flood.
   A. If it were not
   B. Had it not been
   C. If it shouldn’t be
   D. Should it not be

3. It was in the very lab where he spent his youth _______ he made the groundbreaking discovery.
   A. which
   B. where
   C. that
   D. when

4. Only by adopting a more sustainable lifestyle _______ to mitigate the effects of climate change.
   A. we can hope
   b. can we hope
   C. hope we can
   D. we hope can

5. So fast _______ that it is difficult for many people to keep up with the latest trends.
   A. technology does develop
   B. does technology develop
   C. technology develops
   D. has technology developed

6. The teacher suggested that the students _______ the project before the deadline.
   A. finished
   B. would finish
   C. finish
   D. must finish

7. _______ is often the case with him, he was late for the crucial meeting again.
   A. Which
   B. What
   C. As
   D. It

8. Hard we tried, _______ we couldn't persuade him to change his mind.
   A. but
   B. yet
   C. /
   D. and

9. No sooner _______ their seats than the curtain rose and the play began.
   A. they had taken
   B. had they taken
   C. did they take
   D. they took

10. It is essential that every participant _______ informed of the change in the itinerary.
    A. be
    B. is
    C. will be
    D. was

11. Under no circumstances _______ to leave the laboratory without supervision.
    A. are students allowed
    B. students are allowed
    C. allowed are students
    D. do students allow

12. _______ the boss's support, we wouldn't have been able to complete the project on time.
    A. But for
    B. Thanks to
    C. Except for
    D. As for

13. "Where is my phone?" "_______ on the desk where you left it."
    A. There it is
    B. There is it
    C. It there is
    D. Is it there

14. To such an extent _______ his pride that he refused to admit his mistake.
    A. did he hurt
    B. was he hurt
    C. he was hurt
    D. was his pride hurt

15. It was not until I reached the airport _______ I realized I had forgotten my passport.
    A. then
    B. when
    C. that
    D. before

第二部分：句式转换与改写 (共10题，每题4分)

按要求重构句子，考察对句式变换的熟练程度。

(思考：转换练习能暴露一个人是否真的理解句子结构。如果只是生搬硬套公式，遇到稍微复杂的逻辑就会出错。)

16. 使用强调句强调主语：
    The CEO personally handled the crisis.

    ---

17. 使用倒装句（Hardly...when...）：
    As soon as he arrived home, it started to rain.

    ---

18. 使用虚拟语气（Without...）：
    If we hadn't had your help, we would have failed.

    ---

19. 将陈述句改为部分倒装：
    I have never seen such a magnificent sunset before.

    ---

20. 使用 "So...that" 倒装结构：
    The weather was so cold that the lake froze overnight.

    ---

21. 将宾语从句改为“疑问词+to do”结构：
    I don't know how I should solve this problem.

    ---

22. 使用 "It is high time..." 结构：
    You should start thinking about your future career.

    ---

23. 使用 "Were it not for..." 改写虚拟条件句：
    If there were no water, there would be no life on Earth.

    ---

24. 使用 "As" 引导的让步状语从句（倒装）：
    Though he is a child, he knows a lot about history.

    ---

25. 使用省略句简化：
    If it is possible, please let me know your decision by tomorrow.

    ---

第三部分：综合应用与纠错 (共5题，每题6分)

识别并修正句式错误，或进行深度翻译。

(思考：最后这部分需要一点“批判性思维”。很多人觉得只要语法通顺就行，但地道的英语往往追求简洁和逻辑的严密。)

26. 纠错： Only then he realized that he had made a grave mistake in his calculations.

    ---

27. 纠错： It was because of his laziness which he failed the final exam.

    ---

28. 翻译（使用虚拟语气）： 要是你早听我的建议，你现在就不会陷入这种困境了。

    ---

29. 翻译（使用倒装句）： 直到昨天我才收到他的回信。

    ---

30. 翻译（使用强调句）： 正是这种对未知的恐惧阻碍了我们前进。

    ---

参考答案与解析

(思考：答案必须清晰。对于复杂的倒装和虚拟，我会点出其逻辑核心，而不仅仅是给个结果。)

第一部分

1. B (Not until 位于句首，主句须部分倒装)
2. B (对过去的虚拟，If 省略后 Had 提前)
3. C (强调句：It was + [地点状语] + that...)
4. B (Only + 介词短语位于句首，主句部分倒装)
5. B (So + adj./adv. 位于句首，结果状语从句部分倒装)
6. C (Suggest 后的宾语从句用 should + 动词原形，should 可省略)
7. C (As 引导定语从句，指代后面整个句子的内容)
8. C (Hard as/though we tried，倒装后不需要连接词 but)
9. B (No sooner...than 结构，前句用过去完成时并倒装)
10. A (It is essential that... 虚拟语气，用原形)
11. A (Under no circumstances 否定词组位于句首，全倒装/部分倒装)
12. A (But for "要不是"，常用于虚拟语气)
13. A (Here/There 位于句首，主语是代词时不倒装)
14. B (To such an extent 位于句首，主句部分倒装，注意是被动语态)
15. C (It was not until...that... 强调句型的固定结构)

第二部分

16. It was the CEO who/that personally handled the crisis.
17. Hardly had he arrived home when it started to rain.
18. Without your help, we would have failed.
19. Never before have I seen such a magnificent sunset.
20. So cold was the weather that the lake froze overnight.
21. I don't know how to solve this problem.
22. It is high time (that) you started/should start thinking about your future career.
23. Were it not for water, there would be no life on Earth.
24. Child as he is, he knows a lot about history. (注意：名词前不加冠词)
25. If possible, please let me know your decision by tomorrow.

第三部分

26. 修正： Only then did he realize... (Only+时间状语位于句首，主句倒装)
27. 修正： It was because of his laziness that he failed... (强调句连接词只能用 that/who)
28. 翻译： If you had followed my advice, you wouldn't be in such a dilemma now. (错综时间虚拟语气)
29. 翻译： Not until yesterday did I receive his reply. (或使用强调句：It was not until yesterday that I received his reply.)
30. 翻译： It is the fear of the unknown that prevents us from moving forward.

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