{#blank#}1{#/blank#} adj. 严肃的，认真的。

{#blank#}2{#/blank#}对某人/某事当真

Peter is serious about Jenny. He wants to get married to her.

{#blank#}3{#/blank#}对某事当真

He's serious about selling his house.

Your homework is very good {#blank#}1{#/blank#} a few spelling mistakes.

There is a black {#blank#}1{#/blank#} {#blank#}2{#/blank#} the bed.

A good friend {#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#} music, too.

Please {#blank#}1{#/blank#} to take your ID card before arriving at the train station.