The Chinese mainland pandas, Tuantuan and Yuanyuan, _____ to Taiwan on Dec. 23nd,2008. [ ]

A. sent

B. were sending

C. had sent

D. were sent

在Windows桌面的任务栏中，显示的是( )。

A．当前窗口的图标
B．除当前窗口外的所有已打开窗口的图标
C．所有已打开的窗口图标
D．不含窗口最小化的所有被打开的窗口图标