. My English teacher’s humor was _________ make every student burst into laughter.
Jade is the highest award in Chinese culture and medals are the most important prize in Olympics,so medals with jade is the perfect ______ to present the Olympics in Beijing.
Please ______ the traffic regulations.
Every boy and every girl ______ that each day and each hour brings ______ duty.
—What do you think of the meal we have just had? —It is well worth ______ is changed for it.
It was foolish of him to ______ his notes during that important test,and as a result,he got punished.