题型：单选题题类：真题难易度：普通

Doing eye exercises one of the useful ways to protect our eyes.

A、is B、are C、were

举一反三

Mary {#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#} {#blank#}4{#/blank#} watching football matches.

—I {#blank#}1{#/blank#}(write)a report now.

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