诊断有无排卵，理想的诊刮时间是（）

A.月经第1天

B.月经第5天

C.月经干净后3天

D.月经周期中间

E.月经来潮6小时内

— What do you usually do on your ________?

— I usually play games and type my homework.

A．computer

B．blackboard

C．notebook

D．keyboard