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Q: With the help of the given options, fill in the blanks in the following sentences. I knocked____ the door but no one answered.
  • A. into
  • B. in
  • C. at
  • D. off
Correct Answer: Option C - In the above sentence 'at' will be used in the blank space because preposition 'at' is used with 'knock'. Other options are not correct. Correct sentence - I knocked at the door but no one answered.
C. In the above sentence 'at' will be used in the blank space because preposition 'at' is used with 'knock'. Other options are not correct. Correct sentence - I knocked at the door but no one answered.

Explanations:

In the above sentence 'at' will be used in the blank space because preposition 'at' is used with 'knock'. Other options are not correct. Correct sentence - I knocked at the door but no one answered.