it can be he that has taken my pen 三个简单的句型请教下

it can be he that has taken my pen 三个简单的句型请教下 it can be he that has taken my pen这句我有疑问帮看下 i left my pen on the dask and now it isgone ,who has taken为什 _______has taken my pen by mistake.I can't find it. 改病句：please find who has taken away my pen it could be that he was happy 的意思 it could be that +从句 是句型吗 it has to be taken care of . Someone has taken away my glasses,so that i can't see anythi my book has disappeared.who______have taken it? It can be easily proved that 这个句型 It has taken Joe a long time to_____ the fact that he won't Who___away my pen?A.have taken B.takes C.has taken D.took