第一部分：单句填空（共10小题）

说明：请根据括号内动词的提示，填入正确的谓语形式。

1. In the past few decades, great changes ___________ (take) place in the way people communicate with each other.
2. The project, which ___________ (start) last year, is expected to be completed by the end of 2025.
3. If the weather permits, the outdoor concert ___________ (hold) as scheduled next Saturday.
4. I was walking down the street when I suddenly realized I ___________ (leave) my keys in the office.
5. It is reported that a new railway line ___________ (build) in this area currently to improve local transport.
6. Not until the meeting was over ___________ (realize) he that he had made a serious mistake.
7. The professor, along with his assistants, ___________ (work) on this chemical experiment for three years now.
8. By the time the rescue team arrived, the trapped villagers ___________ (wait) for more than 48 hours without food.
9. Listen! The song ___________ (sing) by the children sounds so sweet and familiar.
   (Wait, let me re-check this. "Sounds" is the main verb, the blank should be a predicate? No, if it's one sentence, I need to ensure the blank is indeed the predicate. Let me rephrase for a pure predicate test.)
10. (Revised) Listen! Our school anthem ___________ (sing) by the students in the stadium right now.
11. If I ___________ (know) your phone number yesterday, I would have invited you to the party.

第二部分：语篇实战（共10小题）

说明：阅读下面短文，在空白处填入括号内动词的正确形式。

Artificial Intelligence (AI) has become a hot topic in recent years. Since it first 11. ___________ (introduce) decades ago, AI technology 12. ___________ (evolve) significantly. Today, it 13. ___________ (apply) to various fields, from healthcare to finance.

Last month, a groundbreaking study 14. ___________ (publish) in a leading scientific journal. The researchers claimed that they 15. ___________ (develop) a new algorithm that could predict weather patterns with 99% accuracy. While many experts 16. ___________ (impress) by the results, some others expressed concerns. They worried that if such technology 17. ___________ (misuse), it could lead to unpredictable consequences.

Currently, governments around the world 18. ___________ (discuss) how to regulate the development of AI. By the time a global consensus 19. ___________ (reach) in the future, technology will likely have advanced even further. It is essential that we 20. ___________ (remain) cautious yet optimistic about what the future holds.

答案与解析

第一部分：单句填空

1. have taken
   解析： "In the past few decades" 是典型的现在完成时标志，表示从过去持续到现在。take place（发生）是不及物动词短语，无被动语态。

2. was started
   解析： "last year" 明确了过去时间，且 project 与 start 之间是被动关系，故用一般过去时的被动语态。

3. will be held
   解析： "next Saturday" 提示将来时，concert 与 hold 是被动关系。

4. had left
   解析： "realized" 是过去发生的动作，而“忘带钥匙”发生在“意识到”之前，即“过去的过去”，用过去完成时。

5. is being built
   解析： "currently" 提示现在进行时，railway line 与 build 是被动关系，故用现在进行时的被动语态。

6. did he realize
   解析： "Not until..." 置于句首，主句需部分倒装。根据从句 was 确定为一般过去时。

7. has been working
   解析： "for three years now" 强调动作从过去开始一直持续到现在，且仍在进行，用现在完成进行时。主语是 The professor，谓语用单数。

8. had been waiting / had waited
   解析： "By the time + 过去时从句"，主句用过去完成时。此处强调持续过程，用过去完成进行时更佳。

9. is being sung
   解析： "Listen!" 和 "right now" 提示动作正在进行，且 anthem 与 sing 是被动关系。

10. had known
    解析： 虚拟语气。根据 "yesterday" 可知是对过去的虚拟，if 从句谓语用 had + 过去分词。

第二部分：语篇实战

11. was introduced
    解析： "decades ago" 指过去，AI 与 introduce 是被动关系。

12. has evolved
    解析： "Since" 引导的时间状语，主句通常用现在完成时。evolve 在此处作不及物动词。

13. is applied
    解析： "Today" 提示一般现在时，AI 与 apply 是被动关系。

14. was published
    解析： "Last month" 明确过去时间，study 与 publish 是被动关系。

15. had developed
    解析： "claimed" 是过去，研发算法发生在 claim 之前，用过去完成时。

16. were impressed
    解析： 描述过去的状态或感受，用一般过去时。

17. is misused
    解析： if 引导的条件状语从句，遵循“主将从现”，此处表示一种普遍的可能性或假设，用一般现在时的被动语态。

18. are discussing
    解析： "Currently" 提示现在进行时。

19. is reached
    解析： "By the time" 引导的将来时间状语从句，用一般现在时表将来，且 consensus 与 reach 是被动关系。

20. (should) remain
    解析： "It is essential that..." 引导的主语从句需用虚拟语气，形式为 (should) + 动词原形。

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