Choose the letter A, B, C or D to complete the sentences ⇱
Question 1. Scientists think it is possible to send humans on a __________ to Mars by the 20130s.
Question 2. The atmosphere on Mars is quite similar __________ that on Earth.
Question 3. It was so kind of him __________ me when I was homeless
Question 4. This water is __________ poisonous that people here can’t drink.
Question 5. “What subject do you find the most difficult?” My mother asked.
⇒ My mother asked what subject ____________ the most difficult.
⇒ My mother asked what subject ____________ the most difficult.
Question 6. Our lives are in __________ because of pollutions
Question 7. Scientists claimed that there __________ eight planets in our solar system.
Question 8. I love __________ at pictures of the galaxy very much.
Question 9. I’m curious about the __________ space of the Earth.
Question 10. I can’t stand __________ with such a talkative person like her.
Question 11. Space __________ is the main vehicle for astronauts to travel on the Moon.
Question 12. There have been some traces proving the __________ of aliens.
Question 13. Have you ever seen a flying __________?
Question 14. Neil Armstrong is considered as the first person __________ on the Moon.
Question 15. The astronaut wears a __________ to protect him from the dangers of being outside in space.