__________ his project, the boy had to stay up late.

A．Not finishing

B．Not finished

C．Having not finished

D．Not having finished

右图是用低倍镜观察到的物像。若要把字母d移到视野的中央，应将玻片往哪个方向移？(   )

A．向上移动

B．向下移动

C．向左移动

D．向右移动