问题
选择题
Ads sometimes help people learn more about new products, but at other times ads _______ tell lies. [ ]
A. must
B. can
C. need
D. should
答案
答案：B
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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：B