【題目】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：保護我們的環(huán)境是每個人的職責(zé)。我相信，如果我們大家齊心協(xié)力，我們一定能做些什么來改善我們的生活條件。

考查there be句型。it must be它一定是；there must be一定有；there must have形式錯誤。根據(jù)句意可知，這里表示“一定有一些我們可以做的事”，應(yīng)用there be句型，此處must表示肯定的推測。故選B。

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