Withthepriceofpetrolincreasing,allconsumerswishscientis...

問題詳情：

With the price of petrol increasing, all consumers wish scientists to invent new advanced     biofuel as a(n) __________ to gasoline.

A. avenue                 B. application             C. substitute              D. alternative

【回答】

D

知識點：形容詞

題型：選擇題