Questions can be classified according to different criteria. One classification makes a distinction between closed questions and ______ questions.

A. It’s time for us to have class.
B. What’s the weather like today?
C. Let’s begin our class.
D. Where is the monitor?

A. Please look at the black-board
B. Are you all here?
C. Be quiet, please.
D. Class is over.

A. I have a question.
B. Something you don’t understand?
Can you catch me?
D. Any volunteers?

A. Do you need any homework?
B. See you tomorrow/next time.
C. For today’s homework, I want you to do Exercise 1 on Page 9.
D. Practise after class.