题目内容：

Several days ago, a letter attracted a lot of attention on the Internet. It was written to NASA by 9-year-old Jack Davis 1. (ask) to be considered for a job working with astronauts. He wrote to apply 2. a planetary protection officer position at NASA. Despite his young age, he thought he would be fit for the job 3. (perfect).

With a pencil, he wrote: “I may be nine, but I think I would be 4. good fit. My sister says I am an alien. Also, I.5. (see) all the space and alien movies in the past years.” Jack ended the letter stating the other 6. (factor) that would make him perfect for the position, such as his great video game skills and his youth,7. would make it easy to learn to think like an alien. He then signed the letter, “Jack, Guardian of the Galaxy.”

The position of planetary protection officer is well-paid every year. The job, however, is more about science and biology and 8. (little) about fighting aliens. The officer must make sure that no new species or plants 9. (bring) to other planets, and doesn’t return from trips to space with anything that might harm Earth. The recent announcement of the position created in the 1960s has caused a lot of 10. (excite) in the public, according to a NASA’s statement.