How long does it take us to go to your hometown from here? —-It takes us hour or more to go to my hometown bytrain.

Which of the two English dictionaries will you buy?——I’ll buy ________ of them, so I can give one to my friend Helen.

Pop music _________ relaxing.

This machine was used ——-years ago.

The meeting ___________ because of the smog in Northern China last week.— Oh, it’s too bad! We should take action to improve the air quality.