Put the words in the correct place in each sentence.
问题描述:
Put the words in the correct place in each sentence.
例句:Astronauts have been to the moon.(already)
Astronauts have already been to the moon.
1.They haven't been to Mars.(yet)
2.Many astronauts have visited the space station.(already)
3.The spacecraft has reached Mars.(just)
答
1.They haven't been to Mars yet.
2.Many astronauts have already visited the space station.
3.The spacecraft has just reached Mars.