Bicycling is good exercise；________, it does not pollute the air[ ]

When did you come back—Half an hour ago. You ____ to music.

foreigners, the Great Wall is worth ______.

My parents and I have a(n) ________ time watching the film The Fury becauseeveryone in the family is so excited about war stories.

I’ll never forget the days___ I spent in the country with the farmers, ____, of course, has a great effect on my life