"Can we fix it? Yes, we can fix it!"
Translation:'oH wItI'laH'a'? HISlaH, wItI'laH!
'oH is not required and it is also correct without it. All the variations are accepted as correct, 'oH in the first sentence, 'oH in the last sentence, 'oH in both sentences, or 'oH in neither. If yours wasn't accepted, you probably had some other error. Did you report it as "my answer should have been accepted" or take a screen shot of it?