Question

【题目】—Can I tell Mary about your decision?

—No, I don't want anyone else to know it. You _______ keep it to yourself.

A.mustB.needC.canD.may

Answer 1

【答案】A

【解析】

句意：——我能告诉Mary你的决定吗？——不，我不想让其他人知道。你一定要保密。

考查情态动词辨析。A. must必须；B. need需要；C. can能够；D. may可能。根据I don't want anyone else to know it.可知“我”不想让别人知道，强调说话者的主观意愿，用must。故选A。