—Why does the lake smell terrible ? --because large quantities of water ____.
America is fond of carrying out hegemonism (霸权主义) all over the world. In the long run they will have to pay _____ price than September 11th.
If you work hard, you will _____ a good teacher.
--- Who broke the window? --- I _____.
—Turn off the TV, Jack. ____your homework now? —Mum, just ten more minutes, please.
—What do you think we can do for our aged parents? —You ________ do anything except to be with them and be yourself.