The world’s elderly population will exceed(超过) ____ of children by 2060, when each group ____ to account for about one fifth of the population.
--- Hello, everyone! Have you heard the meeting will be put off till next Tuesday? --- That’s what we_________about when you came in.
_________was reported in the paper, more than one hundred miners were saved.
Water, which seems so simple and common, is_________makes life possible.
You may take _________ half of the cake; they’re exactly the same.
Sorry, I’m late. The car _________down on my way here.