问题
                    
I think _________ of the materials I listened to at the beginning of the exam __________ easy.
                            A:two thirds; is
B:second three; are
C:two thirds; are
D:two third; are
                        
                        B:second three; are
C:two thirds; are
D:two third; are
正确答案是:
                        
                        
                        
                    同类题型
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