问题
                    
The number of the students in our grade _______about six ______, ______ of them are girls.
                            A:are, hundreds, two- thirds
B:is, hundred, two- third
C:is, hundred, two thirds.
D:are, hundreds, two third
                        
                        B:is, hundred, two- third
C:is, hundred, two thirds.
D:are, hundreds, two third
正确答案是:
                        
                        
                        
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