我要问英语问题where is my pen I___it here but now I can't find it A

我要问英语问题
where is my pen I___it here but now I can't find it
A.put B.have just put C.was putting D.has just put
Hurrp up!We're all watting for you.
I____for an important phone call.GO with me.
A.wait B.was watting C.am wating D.waited
Mr Green always tells his son a story before he ____ to sleep.
A.will go B.went C.is going D.goes
LOOK!What a clean room!who___it?
A.has tied B.is tidying C.will tidy D.tied
C D A 错的选项又错在哪里.