After having gone far, George did not want to turn back.
The development of industry has been ________ gradual process throughout ________human existence,from stone tools to modern technology.
Tu Youyou was ________ the 2011 Lasker clinical Medical Research Award on September 12 because she discovered a drug called artemisinin ________ against malaria.
It's impossible for her to have more free time to accompany her parents because her work ______ much of their time.
She covered the 2,000 meters in 6 minutes, _______ second on the list of all the players.
When you look for a job, it’s not your book knowledge but your experience _______matters more.