The world is getting smaller and smaller because the Internet gets us .
Mary had few close friends. So she didn’t know ________ about the problems.
---It’s a long timewe last met. How is everything going? ---Well, I am living a happy life.
--- _________ has he taught in the school? ---Since he left the college.
--- Must I return the book this week? --- No, you ____________. You can ____________ it for 20 days.
Look! __________ high speed the car is __________! It’s so dangerous.