31. Why do investors worry about the increasing production of biofuels?
(A) It might endanger future profits.
(B) It will lead to environmental problems.
(C) It costs more money to grow them.
(D) It diminishes the demand for soy bean.
詳解 (共 1 筆)
未解鎖
理由:第一段明確說明,若未審慎考慮長期影...