They have done well _____ that they are green hands.
Sitting alone by the window, all the memories __________ .
The other day, when I was wandering in the street I ________ one of my old friend, Jim.
Though we spent a lot, we think it _____ because we succeeded in the end.
The conference has been held to discuss the ________of global warming on people’s lives all over the world.
At the railway station,the mother waved goodbye to her daughter until the train was________.