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

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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