阿摩線上測驗
39.According to the passage, what is the primary disadvantage of biofuels?
(A)They are a renewable resource.
(B)They consume a lot of energy during the production.
(C)They can replace a large amount of oil consumption.
(D)The process of making them is too complicated.
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統計： A(154), B(1508), C(178), D(256), E(0) #1473626
統計： A(154), B(1508), C(178), D(256), E(0) #1473626
