根据上下文及中文提示填写单词。
Daming and Tony are classmates. Tony has already made a __1__ (模型) of the space station. This is
for his space travel homework, but Daming hasn't __2__ (完成) it __3_ . Tony asks Daming not
__4__ (惊慌) __5__ (因为) their teacher Ms James wants it next week. They have known the
__6__ (最新的) news. Some scientists have__7__ (发射) a spacecraft to Mars. It has taken
__8__ (少数,几个) months to get to Mars. There aren' t __9__ (一些) astronauts in the spacecraft.
What a pity! Maybe it's an unforgettable__10__ (经验).