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【题目】(’16原创)When the teacher speaks, we students ________ keep quiet and take notes.

A.oughtB.mustC.haveD.supposed to

【答案】B

【解析】

考查情态动词词义辨析。句意为:当老师讲话的时候,我们学生________保持安静并记笔记。ought应该,应当,一般和to搭配;must必须;have有,与to连用表示不得不;supposed to,一般为be supposed to“应该,被期望,本应,结合句意及四个词的用法可知应用must。故选B

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