Question

Fill in the blank with the most appropriate word.
I was very impressed _____the lesson he taught.

• A. at
• B. about
• C. by
• D. over

Answer 1

Answer: (C)

by

Option C is the correct answer because 'by' is used usually after a passive verb, to show who or what does, creates or causes something.

Options A, B and D are incorrect because 'at' is used to indicate a specific location or time, 'about' is used to mean in connection with and 'over' is used to talk about movement or position at a higher level than something else