1
I'd like to be an astronaut as I think space ..................... is very important.
2
The earth is one of the eight ..................... of our solar system.
3
..................... have been able to study most of these planets for many years.
4
We can send ........................... further than the moon.
5
Scientists have already sent ........... onto the surface of planets such as Mars.
6
With each journey to space, we can learn more and more about the ................ around us.
7
Ali won’t be able to use the computer until he ..................... it.
8
Once I ..................... reading this book, I will lend it to you.
9
We won’t be able to stay in the hotel until they ..................... painting it.
10
I won’t be able to get a job until I ..................... an English course.
