【单选题】Remember to ask for a ______ of quality for these goods; otherwise they will not offer any maintenance.
                    
A.warranty
B.promise
C.certificate
D.receipt
                
							【单选题】Remember to ask for a ______ of quality for these goods; otherwise they will not offer any maintenance.
                    
A.warranty
B.promise
C.certificate
D.receipt
                
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