often - frequently, wealth - the state of being rich, research - a study that shows new information about something, average - something that represents a middle point, acquaintance - a person that you know but who is not a close friend, nowadays - present time, to do better - have a higher performance, loads of - many, tend to - to be likely to behave in a particular way, earn - to get money for work that you do,

Vocabulary - reading comprehension

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