Importswillbeallowedinproportion_______exports.
WehavereceivedyourletterofSeptember12,______wearegladtoknowthatyouareinterestedinourelectricheaters.
WeenclosedourPurchaseConfirmationNo.4848__in__duplicate^)一式兩份intriplicate(一式三份)
She________everythingelseandconcentratedonthetaskbeforeher.
名詞解釋：offer
