第33题: [单项选择]Which of the following is NOT mentioned as a reason that songbirds molt in the late summer A. Fewer predators are in the woods. B. The weather is still warm. C. The songbirds have finished breeding. D. Food is still available. 参考答案:A 答案解析:该题目与第三段的内容相对应。B、C、D三个选项的内容原文都有涉及,只有A项原文没有涉及。因此,正确答案是A项。