单项选择题

Remember to ask for a______ of quality for the consumer goods; otherwise they will not of- fer any maintenance.

A．certificate
B．mark
C．warranty
D．receipt
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单项选择题
1 tried very hard to persuade her to join our study group but I met with flat______.
A．decline
B．rejection
C．refusal
D．refutation
单项选择题
Everyone is required to______ his feet on the carpet to shake off the snow from his hoots before entering the shopping mall.
A．stamp
B．stretch
C．sway
D．kick
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