Have you seen a ( )pen I left it here this morning.Is it( )black one?I think I saw it somewhere.Is it ( ) black one I think I saw it somewhere.这两个空都填什么?请说明原因.

问题描述:

Have you seen a ( )pen I left it here this morning.Is it( )black one?I think I saw it somewhere.
Is it ( ) black one I think I saw it somewhere.
这两个空都填什么?请说明原因.