单选题
1.
Scientists will have to ______ new methods of increasing the world's food supply in order to solve the problem of famine in some places.
A、
come up for
B、
come down with
C、
come down to
D、
come up with
【正确答案】
D
【答案解析】
come up for air喘口气，调节一下精神；come down with付钱，染上(病)；come down to屈尊做某事，归结起来(为……)；come up with追赶上，想出，提出。提出想法/建议come up with a plan/method.
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