Question

1. Stephen Hawkings has mentioned on __________occasions that the only way for
humanity to survive is to explore space.
2. We will have to look for a new planet if we caused a major disaster that results in the
__________of earth.
3. The first liquid-fuel rocket was send into__________ in 1926.
​

Answer 1

1.numerous

2.destructi

3.launched

4.human

5.development