Sometimes new ideas have to be tested many times before ____

Sometimes new ideas have to be tested many times before ____ It is a common sense that new ideas have to be tested many t New ideas sometimes have to wait for years before ( ). New ideas sometimes have to wait for years before they are__ 一道高中英语题目New ideas sometimes have to wait for years before __ new ideas sometimes have to wait for years before fully acce New ideas sometimes have to wait a long time _B__. New ideas have to wait for years before ( ). and though doctors have tested many times on the reason of c How many times ____Mr.Li __(be)to America He ____(be) there You have tried to get a new password too many times. 英语翻译be able to think ideas through before replying.providing