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Zhai and his crewmates have spent 183 days in an orbit about 400 kilometers above the Earth since their Shenzhou ⅫⅠ spacecraft 【小题1】 (launch) on Oct 16. They were 【小题2】 second inhabitants of China’s permanent space station named Tiangong. During the Shenzhou ⅫⅠ mission, the astronauts 【小题3】 (success) carried out two spacewalks. Wang took part in the first spacewalk on Nov 7, 【小题4】 (become) the first female Chinese spacewalker. The crew members also 【小题5】 (carry) out two science lectures for Chinese students. In those lectures, which were livestreamed worldwide by China Media Group, the astronauts showed viewers 【小题6】 they live and work inside the space station and showed physical 【小题7】 (phenomenon) only possible in microgravity such as “disappearing buoyancy” and a “water ball”. In one experiment, Wang used a Bing Dwen Dwen toy, the popular mascot of the Beijing 2022 Olympic Winter Games, 【小题8】 (display) how objects fly in 【小题9】 (weight) environment. The Shenzhou ⅫⅠ’s space-based lessons marked the start of the Tiangong Class series. Several days before their return, Zhai and his crewmates recorded a video 【小题10】 they answered questions collected from students across China who were curious about their life and tasks.