You____thatlettertoJames.However，youdidn't.
A、oughttowriteB
「句意」 你本应该给詹姆斯写信，然而，你没写。
「难点」 ought to have written 是虚拟语气，与本句句意相符。
_____theirhelp,wewouldnothavesucceeded.
Thecountry’schiefexportsarecoal,carsandcottongoods,cars_____themostimportantofthese.
_____nocauseforalarm,theoldmanwentbacktohisroom.
Aleading___________intelligenceandoperationscompanyhasreleaseditsanalysisofworldwidereportedincidentsofpiracyandcrimeagainstmariners.
Priceshaverecentlyriseninorderto__________theincreasedcostofrawmaterials.
