To avoid an oil shortage more machines must ______ solar energy.

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问题 To avoid an oil shortage more machines must ______ solar energy.

选项 A、develop
B、introduce
C、exercise
D、utilize

答案D

解析 utilize/-ise vt.利用,使用(如:Can you utilize a computer in your work? to utilize one’s abilities in a suitable job)。develop vt.开发,研制;发展,形成。introduce vt.引进,传入;介绍。exercise vt.运用,行使(权力、影响、耐心、谨慎等)。
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