proszę o sprawdzenie 4 zdań

1. The cheese looks as if rats (nibble) it. had nibbled
2.Suppose you (not know) where your next meal was coming from? didn't know
3. I wish transistor radios never (be) invented. would be invented
4.That man has brought us nth but trouble. I wish I never (set) eyes on him. would set

1. ok
2. ok
3. I wish transistor radios never (be) invented. 'would be' HAD BEEN invented
4.That man has brought us nth but trouble. I wish I never (set) eyes
on him. 'would' SET MY