A. Answer the questions about Landing on a Comet.

(Trả lời các câu hỏi về hạ cánh trên sao chổi)

1. What does the word “feat” mean? (line 2)

a. an achievement

b. a mission

c. a historical event

2. Scientists needed another mission to a comet because the first mission ________.

a. didn’t return useful data

b. raised more questions

c. wasn't able to collect any data

3. If the lander’s battery runs out of power, Rosetta will __________.

a. have to land on 67P

b. replace the battery

c. stop receiving data from Philae

4. According to the article, which part of the mission was the hardest?

a. the journey to 67P

b. the landing on 67P

c. analyzing the results from Rosetta

5. Scientists believe that the comet's data may help explain the origins of ____.

a. our solar system

b. life on Earth

c. the Milky Way