问题
                    
If ________, please pay a visit to me and have a further discussion of the issue.
                            A:you are convenient
B:it is convenient
C:it at your convenience
D:it is convenience
                        
                        B:it is convenient
C:it at your convenience
D:it is convenience
正确答案是:
                        
                        
                        
                    同类题型
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