1. 어법상 옳은 것은?

• 1
  Burning fossil fuels is one of the lead cause of climate change.

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• 2
  Another way to speed up the process would be made the shift to a new system.

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• 3
  The investigation had to be handled with the utmost care lest suspicion be aroused.

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• 4
  The paper charged her with use the company’s money for her own purposes.