New words：

involved [in'vɔlvd] adj.涉及的；牵连的；有关的；卷入
be involved in 卷入；涉及；专心

Sample Sentences：

I got involved in a quarrel about the price.
I was so involved in my book I didn't hear you knock.
The evidence shows that Paul is involved in that murder.
Some people tried to stop the fight but I didn't want to get involved.

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