阿摩線上測驗
223. Global warming has been a _____ problem; a number of countries are increasing their efforts to deal with climate change. But we still have a long way to go.
(A) crisp
(B) stubborn
(C) gentle
(D) bare
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統計： A(11), B(24), C(12), D(8), E(0) #1592433
統計： A(11), B(24), C(12), D(8), E(0) #1592433