It is just ____ among countries to host the Olympicsas to win an Olympic medal.
Some of you may have finished Unit One. ________, you can go on to Unit Two.[ ]
What has made him look like lacking sleep?—– _____ his wife is ill and he has to get up several times a night to attend to her.
The Changjiang River is ________in China.
Sharon White is a girl. ______ is ________ first name.