They ________ extensive and possibly dangerous actual flight training.
A、undertakeB
句意：他们经历了大量的并且可能是危险的实际飞行训练。
Traditionallinguistsbelievethatthewrittenformoflanguageis______tothespokenform.
IntheGrammar-TranslationMethod,grammaranalysisandtranslationprovedtobe_______instudyingforeignculturethroughliteraryworks.
Wecannotentertainyoursuggestion________itdoesnotseemworkable.()
Werefer___youletterofMay2.
The newspaper will have to close down if it cannot increase its ________ considerably.
