问题
                    
He _________ carefully, but he _________ nothing.
                            A:heard, listened to
B:listened to, heard
C:listened, heard
D:heard, listened;
                        
                        B:listened to, heard
C:listened, heard
D:heard, listened;
正确答案是:
                         
                        
                        
                    同类题型
                    The threestorey building, ________in the 18th century, was turned into a museum in 1960 [ ]
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