— Great changes have taken place in this city. 

— Right. Many modern tall buildings have been _____ these years. [ ]

A. turned up

B. put up

C. shown up

D. fixed up

把握写字楼开盘活动调性的原则有( )。

A．保值增值空间

B．层次感

C．商务感

D．优越感

E．高端属性