1.when the dispute over duty payment arises between the duty payer and the Customs, the duty payer should first pay the duty and then, within ______days of the issuance of the duty memo, apply to the Customs in writing for a reconsideration of the case.

A. 10 days

B. 20 days

C. 30 days

D. 50 days

2.Under what circumstances shall the Customs lift the seal affixed to the account books, documents and relevant data without delay?

A. Falsifying relevant account books, documents where any possibility is detected of transferring

B. Upon clearance of a case

C. Upon completion of collecting necessary evidence

D. Both B and C