Children under 12 years of age in that country ______ be under adult supervision when in a public library.
Children under 12 years of age in that country ______ be under adult supervision when in a public library.
A、must
B、may
C、can
D、need
【正确答案】:A
【题目解析】:句意:在那个国家,12岁以下的儿童在公共图书馆时必须在成年人的监督下。must 表示必须,符合题意。
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