阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

The first creature 【小题1】 (orbit) our planet was just 2 years old. Her name was Laika.She was a good dog. Her 1957 flight paved the way for space 【小题2】(explore) when scientists wondered【小题3】it was lethal (致命的) for living things.

Humans are explorers since the dawn of civilization. We 【小题4】 (attract) over the horizon to find food or more space, or just to see what beyond those trees or mountains or oceans. Our ability to explore reached new heights. Airplanes shortened distances, simplified travel and showed us Earth from 【小题5】 new aspect. By the middle of the last century, we aimed even【小题6】 (high).

Our first steps into space began. Laika 【小题7】(follow) into orbit four years later by the first human,Yuri Alekseyevich Gagarin. Space travel is nothing like in the movies. Getting from A to B requires complex calculations【小题8】 (involve) inertia (惯性) and gravity. Space is also dangerous. More than 20 astronauts have died while doing their jobs.

That hasn’t stopped people from signing up and blasting off. NASA’s Apollo program had ended【小题9】private companies are readying their own space programs. A company【小题10】(name) SpaceX is hoping to land civilian astronauts on Mars. Maybe you’ll be a member of them. Don’t forget to bring your dog.