Most of the roads were covered with thick snow, ____ made our journey more difficult．

Seeing the policeman, the thief was behaving __________ nothing had happened.

 —It seems that his health is improving.—Yes. It is ten years ___ he _____.

This pen is ___ mine, ___ his.

_____ you are in a speech contest or you are giving a talk in class, a little preparation will make your presentation organized and dynamic.