选择题：

　　1. Which verb form should be used to complete the sentence?

　　a) am reading, rings

　　b) was reading, rings

　　c) were reading, rang

　　d) am reading, rang

　　答案解析：选项a)和d)使用了现在进行时，不符合过去的时间背景；选项c)使用了were，与主语I不一致；因此，正确答案是b) was reading, rings。

填空题：

　　2. Fill in the blanks with appropriate words:

　　I ________ a book when the telephone ________.

　　答案解析：The correct answers are "was reading" and "rang".

判断题：

　　3. True or False: The action of reading happened before the telephone rang.

　　答案解析：True. Based on the sentence structure, the action of reading (I was reading a book) occurred before the telephone rang.

论述题：

　　4. Discuss the relationship between the two actions in the sentence.

　　答案解析：The action of reading and the action of the telephone ringing are happening simultaneously. The sentence indicates that while the person is in the process of reading a book, the telephone suddenly rings. The two actions are not directly related but are occurring at the same time.

　　总结：这道题目是一个考察过去进行时和过去简单时态的语法题，通过选择题、填空题、判断题和论述题的形式来测试学生对不同题型的理解和运用能力。

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