Will you stay for some more days? —Sorry, I_____. My mother called to ask me to go back at once.

It was in the beautiful park____was located by the sea____we first met our new Chinese teacher．

Could I use your computer? —Sorry, I’m going to_____ it now. [ ]

Could I use your phone? —Yes, of course you ____ .

The tall boy ______ be Mike. He has gone to New York to study.