2. 外语
  3. (No wonder) that (man’s) great dream has been someday to control the weather. The first step toward control is, of course, knowl

(No wonder) that (man’s) great dream has been someday to control the weather. The first step toward control is, of course, knowl

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问题 (No wonder) that (man’s) great dream has been someday to control the weather. The first step toward control is, of course, knowledge, and scientists have been (hard at work) for years trying to (keep track for) the weather.
选项 A、No wonder
B、man’s
C、hard at work
D、keep track
答案D改为keep track of
解析 意为“了解……的状态，掌握……的线索”。
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