Where are mt pen? I can't find __(they).

Where are mt pen? I can't find __(they). I can't find my glasses where are they? I can't find my glass.where are they? where is my pen?I can't find it anywhere. LI Ming:Mum,I can't find my shoes.Where are they?Mrs Li:Are Where are my keys?I can't find them .They msut be ( )in your where are the visitors?i can't find them anywhere.maybe they where are my shoes,i can't find them a________ where are my books?i can ’t find（ ） I still can't find the pen that I've been __ for.为什么用looking I can't find my pen. Whiot( )? 1.I can't find my pen.Where is it?-----It may be in your des