2. 外语
  3. With the population explosion, scientists will have to ______ new methods of increasing the world’s food supply.

With the population explosion, scientists will have to ______ new methods of increasing the world’s food supply.

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问题 With the population explosion, scientists will have to ______ new methods of increasing the world’s food supply.
选项 A、come up with
B、carry out
C、lead to
D、stick to
答案A
解析 本题考查动词词组的意义。根据句子意义可以判断合适的只能是选项A(提出)：
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