题目内容

Scientists will have to _____ new ways to solve the water problem.

A. catch up with
B. keep up with
C. come up with
D. make up with

试题答案

C
涓€棰樹竴棰樻壘绛旀瑙f瀽澶參浜�
涓嬭浇浣滀笟绮剧伒鐩存帴鏌ョ湅鏁翠功绛旀瑙f瀽
绔嬪嵆涓嬭浇
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