问题
                    
___ I ask you something, if you are not busy—Yes, ofcourse you _______
                            A:Should; should
B:Could; can
C:Could; could
D:Can; Could
                        
                        B:Could; can
C:Could; could
D:Can; Could
正确答案是:
                         
                        
                        
                    同类题型
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