阿摩線上測驗
42 According to the passage, when can the use of coal and oil be replaced by wind energy and solar power?
(A) immediately
(B) over a period of time
(C) after a long time
(D) never
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統計： A(39), B(454), C(50), D(11), E(0) #1651424
統計： A(39), B(454), C(50), D(11), E(0) #1651424
