問題詳情

Petroleum, or crude oil, is one of the world's __(56)__ natural resources. Plastics, synthetic fibers, and__(57)__ chemicals are produced from petroleum. It is also used to make lubricants and waxes. However, its mostimportant use is as a fuel for heating, for __(58)__ electricity, and especially for powering vehicles.
56.
(A) too important
(B) as important
(C) most important
(D) less importantly

參考答案

答案:C
難度:非常簡單0.907407
統計:A(1),B(2),C(49),D(2),E(0)

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