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。
Chinese Astronauts Give Lecture from Space
Chinese astronauts conducted a science lecture 400 kilometers above Earth to millions of students on Thursday afternoon, as they orbited in the Tiangong space station.
Major General Zhai Zhigang, Senior Colonel Wang Yaping and Senior Colonel Ye Guangfu, all members of the Shenzhou XIII mission crew, 【小题1】(greet) students, teachers and other participants when the lecture started at 3:54 pm. They showed viewers 【小题2】 they live and work inside the space station, which currently 【小题3】 (consist) of a core module, a spacecraft and two robotic cargo spaceships.
【小题4】 (dress) in a specially-designed space suit, Ye demonstrated experiments related to cell 【小题5】(grow) in the weightless environment in space. They compared the shape of cells in artificial gravity and zero-gravity, so as to study their 【小题6】 (change) rules and mechanisms(机制). 【小题7】astronauts also answered questions from students during the lecture.
Tens of millions 【小题8】 primary and middle school students across China 【小题9】(excite) watched the hour-long televised event 【小题10】 (host) by the China Manned Space Agency, the Ministry of Education and other government departments.
