Ⅰ根据句意及所给的中文或音标，写出恰当单词，使句子的意思完整、正确。
He_______（打扫）the floor yesterday．
Xi’an is one of the _______（古代的）capitals in China．
A government is a group of people who make _____（决定） about the way people live．
To our great________（惊奇），the plane has gone missing．
Some _________（公民） in Shanghai have bought this kind of robots．