2. 外语
  3. Scientists wilt have to ______ new methods of increasing the world’s food supply in order to feed more hungry people.

Scientists wilt have to ______ new methods of increasing the world’s food supply in order to feed more hungry people.

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问题 Scientists wilt have to ______ new methods of increasing the world’s food supply in order to feed more hungry people.
选项 A、catch up with
B、come up with
C、keep up with
D、put up with
答案B
解析 (come up with提出)。句意为：科学家们必须提出增加世界粮食供应的新方法，以便养活更多饥饿的人。A．catch up with赶上；C．keep up with跟上；D．put up with忍受。
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