—It has been nation-widely required that every student have daily exercise for one hour.—

问题补充：

—It has been nation-widely required that every student have daily exercise for one hour.

—Yeah.It is high time that we special attention to physical exercise.

A. must；should pay

B. should；paid

C. will；shall pay

D. need；pay

答案：

A. must；should pay

(答案→)B. should；paid

C. will；shall pay

D. need；pay

解析：句意:--每个学生一天必须有一个小时的锻炼身体的时间这是国家普遍的要求。--是的，到了我们应该注意锻炼身体的时候了。Required后的主语从句用虚拟语气，从句谓语动词用should+do;这里是固定句式it is high time+that should+do 或did,故选B。