Football, ________ is an interesting game, is played all over the world.
_____ the poem a second time, the meaning will become clearer to you.
The question _____ at tomorrow’s meeting is of great importance.
Not until she arrived home _____ that her wallet had been stolen.
—Hi, Tom, Any idea where Jane is? — She __ in the classroom. I saw her there just now.
He’s got himself into a dangerous situation _____ he is likely to lose control over the plane.