My cat’s really fat. — You _____ have given her so much food. [ ]

It’s high time they ________ to reduce the cost of production.

______ is it that metals plays such an important part in our daily life?

Exposed to dishonest advertisements every day, we sometimes can hardly ______two similar products and thus we are in a dilemma where we don’t know which to buy.

Don’t forget ______ your homework.John. —Ok. I’ll do it right now.