What are you doing ______ Monday morning? [ ]

The blue jacket (夹克) looks nice on you, _______ is it?—It’s 50 dollars.[ ]

It was foolish of you to take a taxi ______you could walk there in five minutes.

Dad, must I finish my homework today?—No, you ______. You may do it tomorrow.

Have you got an iPhone 5?—No, many young people began to say “No” to it because of _________ follow-up service. By the way, I am a supporter of Chinese products.