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题型：单选题题类：模拟题难易度：普通

They usually spend two hours _______ their homework every day.

A、do B、doing C、to do

举一反三

He used to __________ in a small village, but he has been used to __________ in a big city now.

Rather than _______ on a crowded bus, he always prefers _______ a bicycle.

—Why not _______ to the park now?

—Good idea! Let's go.

I think ________ necessary ________ to take more exercise.

Class, please teach ______the article we will learn tomorrow.

This painting is {#blank#}1{#/blank#} (典型的) of his work.

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