Ourpaymentterms(付款方式)are___,irrevocableletterofcreditforthefullinvoicevalue.()

A man flown to a time zone different by 10 hours will ________ eight days to readjust his palm sweat.

Overemphasisontranslationwillusuallymakethelearner________thefirstlanguageinthelearningofthesecondlanguage.

They ________ extensive and possibly dangerous actual flight training.

—Why didn ’t you buy a new car?

—I would have bought one if I _______ enough money.