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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

A


解析:

这是一种要求或命令,must正合题意。

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A. there are only three books with tapes

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a. the power of hope  b. friendship    c. her uncle      d. nature’s magic

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A. as an advertisement               B. as an introduction to the western literature (文化)

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