肉鸡于出售前_____天禁止使用抗生素，以防药物残留。
A．7
B．10
C．15
D．7~8
参考答案：C
After China launched a______to popularize Chinese, lots of Confucius colleges have appeared in foreign universities.(青岛市)
A．campaign
B．movement
C．measure
D．struggle
