Correct the punctuation by inserting periods, commas, and apostrophes where and if appropriate.

Question

1. We tested his hearing with whistles bells and horns.

Answer:

We tested his hearing with whistles, bells, and horns.

2. The serial 7's revealed in my opinion evidence of abnormalities

Answer:
The serial 7s revealed in my opinion, evidence of abnormalities.
* If you use capital letters or numbers, you do not need to use apostrophes.
not 100% sure where the comma should go

Answer 1

1 is correct.

2 would be better written like this: In my opinion, the serial 7s revealed evidence of abnormalities.

If you have to keep #2 pretty much as is, though, then put commas before and after "in my opinion."

Answer 2

That is , in my opinion depressing