A good plan must be _______, so that it can adapt to some necessary changes.

 Since the early nineties, the trend in most businesses has been toward on-demand, always-available products and services that suit the customer’s ________ rather than the company’s.

More than five        doctors and rescuers have got to Yushu County up to now.

 — You didn’t have a good time at the party? — No, I _____ a lot from the noise made by the band. 

—How did your father　　　　smoking?—The doctor told him to do so，and he took the advice.