It is not the strongest of the species that survives, nor the most intelligent that survives. It is ______ that is most adaptable to change.
It was not until all the fish died in the river_____the villagers realized the serious pollution.
The doctor came up and asked me ______the day before.
The pupil is clever enough to______all these numbers correctly.
Last Sunday morning we all_____Mr Wang’s wedding,including the managers.
Mr. Smith suggested the problem worth paying attention ______ at the meeting.