---Fang QianQian.We will take an examination in physics next week.---Yes, but don’t work too hard______.
-----Do you have a minute? I’ve got something to tell you. -----Ok, ______ you make it short.
-----Are you happy with your new computer? ----- No, it is _______ me a lot of trouble.
If you really have to leave during the meeting, you’d better leave ____ the back door.
—Did the book give the information you needed? —Yes. But _____ it, I had to read the entire book.