— I am sorry to tell you that she has been ________ from our company.
If the population of the Earth keeps on increasing at its present rate, there will eventually not be enough resources (leave) to support life on the planet. By the middle of the 26th century, if present trends continue, we (use)up all the oil that drives our cars, for example. Even if scientists develop new ways of feeding the human race, the crowded conditions on the earth will make necessary for us to look for open space somewhere else. But of the other planets in our solar system are capable of supporting life at present. One possible solution the problem, , has recently been suggested by an American scientist, Professor Carl Sagan. Sagan believes before the Earth's resources are (complete) exhausted it will be possible to change the atmosphere of Venus and therefore create a new world almost as large as the Earth .The difficulty is that Venus is much hotter than the Earth. , there is only a tiny amount of water there.
take charge of, so far, be similar to, go missing , run after, on average |
, this animal other parts of the world, and continues to even today.
He moved to the countryside a peaceful life.
—Yes, she doesn't even have enough to walk upstairs.
—Not really, they are still looking for evidence to see whether Yetis really .
—No, it still remains .