— Where are the Greens, may I ask? 

— Well, they ______ to England. They have been there for nearly a week now. [ ]

A. have been

B. are going 

C. have gone

D. will go

下列关于现值P，终值F，年金A，利率J，计算期数N之间关系的描述中，正确的是( )。

A．F一定，N相同时，I越高，P越大

B．P一定，N相同时，J越高，F越大

C．J，N相同时，F与户呈现同向变化

D．J，N相同时，F与P呈现反向变化