He believes that she is right, _______?
Scientists believe Native Americans arrived by crossing the land bridge that connected Siberia and _________ more than 10 000 years ago.
—Will you go to the party?—Of course I will if _______.
You may have your own decision on this matter,and I have little doubt _________ you’ll succeed.
“_________ break the law should be punished,” the judge shouted.
—Which side can I sit on the boat?—If you sit still,you can sit on ________.