I ______ in Hangzhou for many years, but now I live in Beijing.
The policeman __________ to be reading a newspaper. In reality, he was watching the man near the window.
Athens __________ the birthplace of western civilization.
I didn't tell him __________ news at once because I wanted to give him __________ surprise.
With so many people __________ by sending E-mails every day, it will become more and more important to have a good knowledge of the Internet.
Tom went off to the EXPO Garden with his friends, __________ an exciting day of discovering the unique culture of each nation.