Question

I was surprised when I heard him reveal the secret. / I was surprised to hear him
SO.
a.
I was surprised to hear him reveal the secret.
b. I was surprised for his revealing of the secret.
I was surprised to hear his revealing the secret.
d. I was surprised to hear his reveal the secret.​

Answer 1

Answer:

option A

Explanation:

I was surprised to hear him reveal the secret

Answer 2

Option a. I was surprised to hear him reveal the secret. -This is the answer.

About choosing the right answer:

• We must check if there is agreement among the parts of speech in it.
• Especially, the agreement between subject and verb must be looked into. That is the subject and verb should agree in person and number.
• Then we have to check whether the prepositions are used properly.
• In option b) we have 'surprised for' is incorrect.
• In option c) we have 'his revealing the secret' which is wrong. It should be either 'his revealing of the secret' or 'him revealing the secret'.
• In option d) 'his reveal the secret' is again not right. It can either be 'reveal of' or 'him reveal the secret'.
• Option a) is the correct answer.
• Therefore the answer is: I was surprised to hear him reveal the secret.