.---Sorry, Mum. I’ve lost my pen again.
I it! You never remember to put your things away after using them.
A. knew
B. know
C. have known
D. will know
网友回答
(答案→)A. knew
B. know
C. have known
D. will know
解析：考查时态。句意：抱歉，妈妈。我又丢了我的钢笔。——我知道了。你永远记不住在用完东西后把他们放好。结合语境可知前文描述的是过去发生的动作，故用一般过去时态。选A。