Three mountains, Meili, Baimang and Haba, which are covered snow, tower the land.
When his father started questioning his explanation, he had to ____ more details for his mistakes.
If he _________ more time practicing speaking English before, he ____ able to speak it much better now.
It was not until 1945, ___ the Second World War came to an end, ____ people began to realize the eventual coming of peace.
I’ m tired out. I ______ all afternoon and I don’t seem to have finished anything.
Carol said the work would be done by Octorber, ____ personally I doubt very much.