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【题目】It's everyone's duty to protect our environment. And I do believe if all of us pull together, something we can do to improve our living condition.

A.it must beB.there must beC.there must have

【答案】B

【解析】

句意:保护我们的环境是每个人的职责。我相信,如果我们大家齐心协力,我们一定能做些什么来改善我们的生活条件。

考查there be句型。it must be它一定是;there must be一定有;there must have形式错误。根据句意可知,这里表示一定有一些我们可以做的事,应用there be句型,此处must表示肯定的推测。故选B

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