More teens are smoking in Beijing, ______ the number of primary and middle school students picking up the habit has more than doubled from previous years.
The world ______ is made up of matter.
The reason _______ he gives for not coming is that his mother is ill.
If Bob’s wife doesn’t agree to sign the papers, _______.
She is a beautiful girl and she likes dancing very much. _____.
No sooner _____ the boy fall into the pond than he ____ to his feet and went to the rescue.