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In which sentence does “it” function only as a grammatical subject and not refer to anything?Sentence 1: It is raining.Sentence 2: It is 9:00 o’clock.Sentence 3: It is very cold.Sentence 4: It is my book.

  • A.Sentence 1,2
  • B.Sentence 3,4
  • C.Sentence 1,2,3
  • D.Sentence 2,3,4
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