You forgot to go to the meeting? You _____ important things. It’s so_______.

A．had always forgotten; disappointing

B．are always forgetting, disappointing

C．always forget; disappointed

D．were always forgetting; disappointed

某企业2006年12月31日购入一台设备，入账价值90万元，预计使用年限5年，预计净残值6万元，按年数总和法计算折旧。该设备2008年计提的折旧额为( )万元。

A．16.8

B．21.6

C．22.4

D．24