The.. . houses of many ethnic groups are used to worship the ancestor

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6. The.. . houses of many ethnic groups are used to worship the ancestor.
........
(commune)
7. To become friendlier, you should... with your workmates. (SOCIALISATION)
8. PAUL used to be .... to soft drink, but now he seldom drinks them (ADDICTION)
9. Like my aunt, I want to become a professional dog
(TRAIN)
......