【正文】
uts. been gone been gone Complete the sentences with the expressions in the box. ? 1. A spaceship ________ to Mars. It is ing back to the earth next year. ? 2. Lots of astronauts _________ to the space station. They found it very interesting. ? 3. Some astronauts _________ to the moon twice. ? 4. Two British astronauts ________ to the space station. They will e back in January. P23 have/ has been have/ has gone has gone have been have been have gone ? 1. I’ve just made a model spaceship. ? 2. Has it arrived yet? ? 3. Astronauts have already been to the moon. ? 4. We have not found life on any other plas yet. Are you familiar with these sentences? They are all from this module. ? 5. But no one has been to Mars yet. ? 6. Scientists have not discovered life on Mars yet. ? 7. I haven’t started yet because I’m not sure how to make it. ? 8. They have just received a message from one of our spaceships. ? I’ve just made a model spaceship. ? Astronauts have already been to the moon. ? Has it arrived yet? ? We have not found life on any other plas yet. 用于現(xiàn)在完成時(shí)的否定句