-Where's your father, Tom? -He__to Changsha.A. goes B. went C. has gone
Our teacher is coming. Please stop _____ and keep ________.
There are many CD-ROMs in the bookshop. I don’t know ____ to buy.
---Hello, may I speak to Millie? ---Sorry, she isn’t in. She _________ Nanjing.
I_______ the piano for two years.
Helen often ______ a lot of time listening to music.