问题
                    
By the first day of August, 2007, the PLA has its ______ birthday.
                            A:eighty
B:the eightieth
C:eightieth
D:eighties
                        
                        B:the eightieth
C:eightieth
D:eighties
正确答案是:
                        
                        
                        
                    同类题型
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