_____the Internet is of great help, I don’t think it’s a good idea to spend too much time on it.
.I invited him to dinner, but he___ my invitation with thanks.
The population of this city ,forty percent of which_____, ______ 15% in the last three years
—Guess what? Tom has failed in the exam ____ second time. —How come? He is ___ second to none in English in our class.
The train is running ______120 kilometres an hour.
Jumping out of ____ airplane at ten thousand feet is quite _____ exciting experience.