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( ) 3. People smoke in more public places, for our government takes more measures to control smoking.'

A. are promised to

B. aren't refused to

C. are supposed to

D. aren't allowed to

3. D be allowed to do ...意為"被允許做……";由句意可知此處為否定。

題目來源：仁愛英語同步練習冊九年級上冊下冊合訂本 > Topic1 When was it invented?

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