3. People perform a lion dance to bring (a/an/ the/0) good luck.
4. It's (a/an/ the/0) custom in my family to have dinner at home on Saturdays.
5. What's (a/an/ the/0) matter? Are you all right?
6. Kate has bought a new car since (a/an/ the/0) yesterday.
7. Some people think that (a/an ...
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