摘要：12． shouldn’t be allowed to drive because they are not serious enough at that age． A．Sixteen years old B．Sixteen years olds C．Sixteen-years-olds D．Sixteen-year-olds
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_____ children shouldn't be allowed to drive because they are not serious enough at that age.
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A. Sixteen years old
B. Sixteen year olds
C. Sixteen-years-old
D. Sixteen-year-old
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B. Sixteen year olds
C. Sixteen-years-old
D. Sixteen-year-old