—Mum,  can I go skating now?

—Well,  you may go after your homework _____. [ ]

A. has finished

B. will finish

C. is finished

D. was finished

在对扫描仪做特征化时，针对透射原稿，应使用（）色卡。

A.IT8.7/1

B.IT8.7/2

C.IT8.7/3

D.ECI2002