更重要的是解题的原因（请一一写出）

题目

更重要的是解题的原因（请一一写出）
1.-How clean the bedroom is!
-Yes,I am sure that someone _____ it.
A.cleans B.cleaned C.has cleaned D.had cleaned
2.-Do the dishes,Mike,or I will tell Mun!
-Mind your own ____ ,Sue!
A.action B.duty C.business D.way
3.-We need to _____ a time to have a talk,now!
-What about tomorrow?I am too busy today.
A.put up B.fix up C.use up D.look up
4.-What should I do here?
-Just put all the things ____they were.
A.Where B.when C.whose D.which

答案

1、c因为前面是一般现在时,所以不用最后一个答案,a表示动作,时态不定；b是动作已经过去,而不知道之后的情况；c则是说打扫这个动作是到现在为止已经完成,其结果直接影响到想在的状态（干净clean）恩,2应该是选择c因为...