—Do you know ____ the 2011 Xiamen International Marathon was held?—On January 2.
One ought _____ for what one hasn’t done.
I didn’t see her in the meeting room this morning. She _____ at the meeting.
You _____ to the meeting this afternoon if you have something important to do.
Alexander Granham Bell invented ___ telephone in 1876.
The little boy wishes to be ___.