It was not until 1911, _______ the first vitamin was identified, _______ people realized the importance of it．
A． when; which B． when; that C． that; which D． that; that
The moment I completed the 800-meter race in the school sports meet, my legs _______．
A． gave out B． gave away C． gave in D． gave up
We’ve just heard a warning on the radio _______ a typhoon may be on its way．
A． what B． when C． which D． that
Traditional Chinese medicine is thousands of years old and has developed _______ time．
A． over B． in C． on D． of
_______ with the Japanese government, some Chinese people decided not to buy products from Japan any more．
A． Not satisfying B． Not having satisfied
C． Not satisfied D． Not to satisfy
After I went abroad for further study, _______ of my parents lived with me．
A． none B． neither C． either D． any
