. This room is fifteen feet long ____________ twelve feet wide.
The fact ______ she was offered the job made her very happy.
. ______ it rains when we can’t find a place to escape from the rain?
I have two brothers, _______ are doctors.
My niece cares more for new clothes than anything else in the world, so she is very _______ about what she wears.
------ Who is that man over there? _______ it be our teacher?------ No, it _______ not be our teacher. It _______ be Mr. Zhang.