–I hear your dad _____Shanghai on business. Did he fly there? –Yes, but he will be home tomorrow.
A：will go to
B：has been to
C：has gone to
同学在制作简易（直流）电动机的过程中，若要改变电动机的转动方向，可以（ ）
自东十二区进入西十二区，时刻和日期的变化为（ ）
