Ⅱ.用方框中所给单词的适当形式填空
good launch mission tie spacesuit
On October 31st, 2025, the Shenzhou-21 spacecraft was 1. into space smoothly. Living in space is far different from life on Earth. Without common living conditions, astronauts can't cook daily meals. They take specially prepared food and rest in sleeping bags 2. firmly to the wall. They also stick to daily exercise to avoid physical discomfort in special space environment.
Spacewalk is a vital task for astronauts. Once leaving the space station, they must wear protective 3. to resist extreme temperature and hidden risks. During their six-month stay in orbit, the crew completed various scientific projects. One major 4. was observing and researching space mice, which was a new attempt to study mammals in space.
These valuable experiments allow humans to gain a 5. understanding of life science. Though space work is tough and challenging, it greatly promotes China's aerospace development. The spirits of astronauts also encourage teenagers to pursue their space dreams bravely.

1. launched
2. tied
3. spacesuits
4. mission
5. better

【分析】
通读全文可知，文章围绕神舟21号飞船及宇航员太空生活展开，需结合方框内单词（good、launch、mission、tie、spacesuit）的词义，根据每个空的语法结构、语境确定单词的适当形式：1. 第1空主语是飞船，与动词launch是被动关系，需用被动语态；2. 第2空睡袋与tie是被动关系，需用过去分词作定语；3. 第3空指防护服装，需用名词复数；4. 第4空形容词major后接名词，结合语境选对应名词；5. 第5空修饰understanding，需用形容词比较级。
【解析】
1. 被动语态：神舟21号飞船是“被发射”，被动结构为“was + 动词过去分词”，故填launched；
2. 过去分词作定语：sleeping bags与tie是被动关系，用过去分词tied作定语，修饰睡袋，故填tied；
3. 名词复数：spacesuit是可数名词，此处指宇航员穿的多件防护服，用复数spacesuits，故填spacesuits；
4. 名词：major修饰名词，结合语境“一项主要任务”，填mission，故填mission；
5. 形容词比较级：表示“更好的理解”，用good的比较级better，故填better。
【答案】
1. launched
2. tied
3. spacesuits
4. mission
5. better
【知识点】
被动语态、非谓语动词、形容词比较级
【点评】
本题为英语词汇适当形式填空题，结合语境考查基础语法与词汇运用，需学生分析词性、语态等，难度适中，是常见的英语基础题型。
【难度系数】
0.7