Multiple choice

In which of the following sentences, is a preposition wrongly inserted?

  1. Global Warming has been progressing rapidly since the last five years.

  2. I stay with my family during Diwali.

  3. Our neighbours have gone to Canada for two weeks.

  4. Swati will complete her project within a week.

  5. None of these
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A Correct answer
Explanation

There is a wrong usage of preposition in option 1. Preposition 'since' is used to refer to a point of time and ‘for’ is used for a period of time.

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