--- Mike, since you don’t like to see the film with us, you ____ as well watch TV at home.

--- OK, Mum.

A．can

B．will

C．might

D．must

Declaration documents, import and export documents, contracts and other data directly related to import and export transactions shall be retained for ______ effective from the date of release of import and export goods.

A. one year
B. two years
C. three years
D. four years