A modern city has been set up in ______ was a wasteland ten years ago.
7.Although the causes of cancer ____， we do not yet have any practical way to prevent it.
6.I have to go to work by taxi because my car ____at the garage.
5.―Have you handed in your schoolwork yet? ―Yes，I have. I guess it ____ now.
4.It is said that the early European playing-cards ____ for entertainment and education.
3.As the years passed， many occasions―birthdays， awards， graduations ____ with Dad’s flowers.
en set up in ______ was a wasteland ten years ago.en set up in ______ was a wasteland ten years ago.
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