2. 专升本
  3. The engineers in this lab spent several weeks _______ their plans for the new bicycle.

The engineers in this lab spent several weeks _______ their plans for the new bicycle.

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问题 The engineers in this lab spent several weeks _______ their plans for the new bicycle.
选项 A、withdrawn
B、vanished
C、found
D、hung
答案C
解析
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