Python - 不会打印文件中的文本

Question

我正在尝试创建一个测验程序，从一个文件中读取问题，同时从另一个文件中读取正确的答案。目前我的程序不打印问题或答案，也没有提供任何错误信息，让我感到困惑...... 请原谅我的新手代码，因为我真的很感激任何帮助！ :)

def quiz():
 score = 0
 time.sleep(1)
 topic = input ("Please choose the topic for the quiz. The topics available are: \n- Computer Science \n- History \n Please enter in lower case.\n - ")
 difficulty = input("Please choose the diffilculty. The difficulties available are: \n- Easy \n- Hard \n- ")

  i = 0
  for i in range(0,4):
    with open(topic+" "+difficulty+".txt", "r") as questions:
        question = questions.readline(i)
    print(question)
    time.sleep(0.9)
    #questions.close
    with open (topic+" "+difficulty+" answers.txt", "r") as answers:
        answer = answers.readline(i)
    print(answer)
    #answers.close
    userAns = input()
    #questions.close
    #answers.close
    i = i + 1
    if userAns == answer:
        score = score + 1
return score