I don’t know who invented ________ telephone. It’s really ________ most useful invention.
—Linda,the phone in your office can't be connected all the time.Why?—Oh,sorry,Miss Miles.The service________since last Wednesday.
—Good morning,Doctor White's office.—Hello,this is John Woods.Could you please tell Doctor White I________?My car won't start.
It's only six o'clock now;little Tom should be up,though,because he________for nine hours.
—Have you met Mr.Li?—Yes.When I arrived,he________for Shanghai to attend a national conference.
—Hey,John!I________to meet you here.—Oh,yes.This is my first time to be at the Internet café.Do you often come here?