—Do you know about the accident which happened in the center of the city?
—Yes. But it was some time           we realized the truth.

 Patience is a kind of quality—and that is ____ what it takes to do anything well.

______ seemed surprising to us was ______   he came out first in the speaking competition.

______ you are supposed to do ______ you don't like a thing is ______ it. Don't complain.

_______ I went to the South Lake in Hanzhong, I was deeply impressed with its beautiful scenery.

The young couple, who returned my lost wallet, left _______ I could ask for their names.

  It is uncertain ________ side effect the medicine will bring about, although about two thousand patients have taken it.(2010·浙江)

—Dad, I've finished my assignment.
—Good，and ________you play or watch TV, you mustn't disturb me.

It is still under discussion ________the old bus station should be replaced with a modern hotel or not.(2011·重庆)

He made a promise ________he earned money, he would build a new school to help develop education.