They ________ extensive and possibly dangerous actual flight training.
B
句意：他们经历了大量的并且可能是危险的实际飞行训练。
翻译：Sineethepremiumvarieswiththescopeofinsuranee,extrapremiumisforbuyer'saeeount,shouldadditionalrisksbecovered.
TheultimategoaloflearningaforeignlanguageinaGrammar-Translationclassroomistoenablethestudentsto______itsliterature.
Beforethe16thcentury,Latinwastaughtandlearnedfor____________.
Thenewspaperwillhavetoclosedownifitcannotincreaseits________considerably.
____yourinformation,wehavereceivedacrowdofenquiriesfrombuyersinotherdirections.()