Importswillbeallowedinproportion_______exports.
Hefound_______difficulttostudymaths.
Theintroductionofcontainersintransportgreatly______carriageofgoods.
Wehavetopointoutthatthepostponementofthefulfillmentofthecontract______causeduscertainexpenses.
与广播电视相比，报纸的主要优点是()。
