One should remain ______ and think of ways to escape when facing danger.

Scientists have created the world’s smallest “snowma”, _______ about a fifth of the width of a human hair.[ ]

Miss Zhang teaches ________ Chinese.

I am glad that the Olympic Games will be held in 2008 in China, _______ ?

Hi, I didn’t see you at the party in the company yesterday evening.– Oh, all my family my son’s birthday at home.