She cared more about her students than her own health. That’s why two years passed _____ she was treated for breast cancer.
Once you want to do something, you must get down _____it well. ( )
It was yesterday _____I went to the railway station to meet my uncle. ( )
Liu Yang became the first woman astronaut in China _____into space. ( )
-What's the matter? -The cook _____five minutes ago, and there are fifty dinners still to cook.( )
Most of us_________more than one thousand English words before we came to this school. ( )