---Could I have a window seat ? ---All right. Your flight _____ boarding at Gate 18 at 2:15.
. It is reported that the United States uses___________ energy as the whole Europe.
. In peace, too,the Red Cross is expected to send help___________ there is human suffering.
. Mr Smith has bought a new house in the country, around___________some green trees.
. I'd like to have visited the Palace Museum last week, but something unexpected___________to my father.
. Do you really want to borrow the old room which is empty_______a broken desk and a chair?