介绍:
今天我们来学习3个相近的单词，Assume，know and think。学习一下各自的意思和用法。
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下面是script：
Assume, know, think
Assume: you suppose something is true but you do not have any clue
I assume many people are listening to this are Chinese
Know: to be absolutely certain or sure about something
I know he is from China
Think: to believe or have an opinion on something
I think Qingdao is the most beautiful city in China
大家还在听
