题目内容
（请给出正确答案）
[主观题]
Which of the following statements is true？A．When the weather became cool, he went down the
Which of the following statements is true？
A．When the weather became cool, he went down the mountain and started writing books and articles.
B．When the weather was hot, he went up the mountain and began writing.
C．When the weather was cool, he took long walks on the mountain trails.
D．He liked to walk in the cool evening, thinking about his experiments.
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