The newspaper will have to close down if it cannot increase its ________ considerably.
A、distributionD
circulation：(书报杂志的)销售量，发行额，销路。符合句意。
翻译：Sineethepremiumvarieswiththescopeofinsuranee,extrapremiumisforbuyer'saeeount,shouldadditionalrisksbecovered.
Weshallbegladtoreceiveyouoffer ___walnutmeat,shipment,____September/October;_____transshipmentatHongkong.
TheywillgetthepreparationdoneearlyinMay.
Totrade____thepeopleofalleountries____thebasisofequalityandmutualbenefitisourestablishedpolicy.
They________extensiveandpossiblydangerousactualflighttraining.
