--The plane is due to take off at 7∶50 from the airport. --________ we fail to arrive there in time?
________ hard you try,it is difficult to lose weight without cutting down the amount you eat.(2012·湖南)
—Since you like the car so much,why not buy it? —________,I can't afford it.
The girl had hardly rung the bell ________ the door was opened suddenly,and her friend rushed out to greet her.
Mary made coffee ________ her guests were finishing their meal.
As is reported,it is 100 years ________ Qinghua University was founded.