Toggle Navigation
Games
Blog
Class PIN
Join for Free
Sign in
Toggle Navigation
Games
PIN
Join for Free
Blog
Pricing
Contact us
Help center
Sign in
Study
E4 Unit 7 Lesson 4
0
%
0
0
0
Back
Restart
Astronauts (have to / don't have to) be scientists.
don't have to
Oops!
Okay!
Astronauts (have to / don't have to) come home to Earth.
have to
Oops!
Okay!
Astronauts (have to / don't have to) be scientists.
don't have to
Oops!
Okay!
Astronauts (have to / don't have to) be friendly.
have to
Oops!
Okay!
Astronauts (have to / don't have to) take the space shuttle to get to space.
have to
Oops!
Okay!
Astronauts (have to / don't have to) wear space suit outside the space station.
have to
Oops!
Okay!
Astronauts (have to / don't have to) be friendly.
have to
Oops!
Okay!
Astronauts (have to / don't have to) stay strong.
have to
Oops!
Okay!
Astronauts (have to / don't have to) come home to Earth.
have to
Oops!
Okay!
Astronauts (have to / don't have to) leave the space station.
have to
Oops!
Okay!
Astronauts (have to / don't have to) stay strong.
have to
Oops!
Okay!
Astronauts (have to / don't have to) take the space shuttle to get to space.
have to
Oops!
Okay!
Astronauts (have to / don't have to) wash dishes.
don't have to
Oops!
Okay!
Astronauts (have to / don't have to) wear space suit outside the space station.
have to
Oops!
Okay!
Astronauts (have to / don't have to) work all the time.
don't have to
Oops!
Okay!
Astronauts (have to / don't have to) work all the time.
don't have to
Oops!
Okay!
Your experience on this site will be improved by allowing cookies.
Allow cookies