题型：单选题题类：真题难易度：普通

Playing computer games too often _____ our eyes.

A、is helpful to B、 is harmful to C、 is good for

举一反三

—No, she's out. Can I take a ________ for her?

Dave {#blank#}1{#/blank#} go to bed {#blank#}2{#/blank#} his father came back home last night.

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