问题
                    
Bill is an _______ boy.
                            A:eight years old
B:eight-years-old
C:eight-year-old
D:eight-year-olds
                        
                        B:eight-years-old
C:eight-year-old
D:eight-year-olds
正确答案是:
                        
                        
                        
                    同类题型
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