_____ has been a heated discussion over which country bakes the world’s best pizza: Italy, where pizza began or the US, where it was globalized [ ]

________ you have seen both fighters，________ will win?

I can’t find my cat, _______ a blue cat, ________ ears are small.

More and more people have lost their jobs. No one knows how long it will be before the nation _______ from its present trouble.

Could you please tell me something about thetwo _________________. They are exchange students of No. 1 Middle School.