Question

there when the crime happened, I only heard about it afterwards. 1. was 2. was not 3. were not 4. will not

Answer 1

The question seems a bit incomplete but I believe the correct answer should be 2. was not.

That would correctly complete the sentence like so:

I was not there when the crime happened, I only heard about it afterwards.

Answer 2

2. Was not would be correct sine they only heard about it afterwards