提醒：点这里加小编微信（领取免费资料、获取最新资讯、解决考教师一切疑问！）
语法填空（6分）
A science lecture 400 kilometers above Earth was delivered by Chinese astronauts on China's Tiangong space station, 1 they displayed unique physical phenomena in the orbiting spacecraft. Featuring interactive teaching, it was mainly targeted at youngsters.
In 2013, with the assistance of two other crew members, Wang Yaping delivered the country’s first space lecture, making China, following the United States, 2 (become) the second country to carry out a space lecture.
Compared with the class nine years ago, this year’s lecture was greatly different. Apart from a bigger “classroom”, it covered a wider range of subjects. Previously Wang showed students the laws of physics and the phenomena of 3 (weightless) in space. But this year, biology 4 (add). The astronauts compared the growth and shape of cells in different environment to study their changing rules.
5 these space lectures showed various topics, the aim behind never changed. According to China Daily, the space lectures aim to “spread knowledge about 6 (man) spaceflights and spark enthusiasm for science among young people”.
提醒：点这里加小编微信（领取免费资料、获取最新资讯、解决考教师一切疑问！）
