The boys ______ games after class. But they ______ football now. [ ]

A. play, are playing

B. are playing, play

C. play, play

D. are playing, are playing

增感屏的使用注意事项中错误的是（）

A.不应存放在高温、潮湿及过分干燥的地方

B.防止水或药液溅污

C.胶片应随装随用

D.暗盒要直立放置

E.应定期用乙醇清洁剂擦去污剂，擦去污剂后强光晒干