Question

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

A.oughtB.mustC.haveD.supposed to

Answer 1

【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。