-----Who ______ it be that hasn’t handed it in yesterday? ------It _______ be Bob. He handed it in yesterday.
The fact ___ she was often late for school made her teacher angry.
The scientist said videophone could be used ___ the conferences.
A lot of cities, ___ Shanghai and Guangzhou , are getting more and more beautiful.
May I use your pen please? I have no pen ___.
We’re getting on very well with each other and ___ our room with him.