—Who taught ________ to write the computer programs? —Nobody. She learned it by __________.
_____ John was watching TV, his wife was reading a book.
There’s _____ wrong with my computer. I’ll have it _____ .
Mr Liu is ____ unusual teacher. He has written _____ useful book for his students.
—Would you mind my using your computer?—______
I wonder __________ achieve a balance between my schoolwork and my hobbies.