15. ____ ! There is a train coming.
Mr.Garcia ______ anyone who hasn't had a college education.
—Can I help you,Madame?—Oh,thanks,but I can ______ it myself.
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.