He thought about _______to Greece or Spain, but decided _____Canada. [ ]

We’ll be back for our school’s _____ anniversary ceremony(周年庆典). –I see. That means you’ll have a get-together with your classmates in ___ years.

When you at a restaurant, please order just enough food.

_____ many times, but he still doesn’t know how to operate the machine properly.

Who is ________ English teacher?— Well, it’s Mrs. Green. She teaches ________ English very well.