—_____is his backpack?  

—It is in the room.        [ ]

A. How              

B. Where                    

C. What

在报表中要显示格式为“共N页，第N页”的页码,正确的页码格式设置是

A．="共"+Pages+"页，第"+Page+"页"

B．="共"+[Pages]+"页，第"++"页"

C．="共"&Pages&"页，第"&Page&"页"

D．="共"&[Pages]&"页，第"&"页"