Tu Youyou is the first Chinese _________ the Nobel Prize in Medicine for her work in developing effective drugs against parasitic disease.
The small mountain village we spent our holiday last month lies in is now part of Hubei .
The man showed us so heavy a stone _______ no man can lift.
______ he met with the difficulty did he realize the importance of our help.
There is not one of us wishes to help you . We are doing our best .
—Alice, you feed the bird today; ? —But I fed it yesterday.