◎ 题干
Ads sometimes help people learn more about new products, but at other times ads _______ tell lies.

[     ]

A. must
B. can
C. need
D. should
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Ads sometimes help people learn more about new products, but at other times ads _______tell lies. [ ]A. must B. can C. need D. should …”主要考查了你对  【情态动词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。