I heard that some patients who had undergone laser eye surgery experienced sudden losses of vision, ______?

Life is ten percent what happens to you and ninety percent _________ you respond to it.[ ]

If you win the competition, you will be given ____ to Europe for two.

What do you think of the voice of Adele who won 2017 Grammy Awards— Oh, I’ve never heard ________ one.

It is no use ______ to persuade him _______ smoking because he has been addicted to it.