空气中有害物质浓度随季节发生变化的工作场所，应将空气中有害物质浓度最高的( )选择为重点采样季节。

A．时段

B．工作日

C．季节

D．接触时点

— Would you like to come to the party here on Saturday?

— I'd love to, but my father insisted that I _____ to see my grandparents at the weekend.[ ]

A. go

B. will go

C. must go

D. would go