Fresh food is good for you . But you have to _______it first because sometimes it is a little dirty.
A：taste
B：smell
C：wash
D：plant
王杰跑400米只用了75秒，平均每秒跑多少米呢?
716－319=____ 567＋334=____ 901－609=____
经济大危机爆发后，胡佛总统依然恪守自由经济政策，结果导致了经济的不断恶化，罗斯福上台后果断采取的措施是（ ）
Listen! Someone for help.
