choose the correct answer 

1. habitable( có thể ở được)

2. floats( nổi, lơ lửng)

3. microgravity( k trọng lực)

4. astonauts (phi hành gia)

5. galaxy( dải ngân hà)

6. land( hạ cánh)

7. launched( phóng)

8. meteorise ( thieenthach)

9. rinseless( k rửa)

10. orbit( quỹ đạo)

III.

1. this is the man who works  for NASA

2. the company which they work for offers space tourism

3. we visited the monuments which was built a hundred years ago

4. the victims of the flood were half-starved for many days need help

IV. 

1. who

2. whose

1. habitable

2. floats

3. microgravity

4. astronauts 

5. galaxy

6. land

7. launched

8. meteorize 

9. senseless

10. orbit

III

1. this is the man who works  for NASA

2. the company which they work for offers space tourism

3. we visited the monuments which were built a hundred years ago

4. the victims of the flood were half-starved for many days need help

IV. 

1. who

2. whose