---- Did he give you advice on your work yesterday?---- Yes. But his advice, as a matter of fact, ______ my difficulty.
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.