Period Six Communication Workshop,Culture Corner, Bulletin Board & Writing Ⅰ.用适当的介、副词填空 1.________ April 12,1961,Russian astronaut Yuri Gagarin became the first person ________ space.2·1·c·n·j·y 2.On January 28,1986,these seven American astronauts died when the space shuttle Challenger exploded soon________ launching. 3.Millions ________ people around the world and many students ________ primary and secondary school..