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.