答案　A

　　2．The "space race" between the US and the USSR ended with ________.

　　A．the first manned flight

　　B．the moon landing

　　C．the launch of Sputnik 1

　　答案　B

　　3．Human beings first set foot on the moon in ________.

　　A．1957 B．1961

　　C．1969

　　答案　C

　　Ⅱ.课文语法填空

　　By the beginning of the 21st century，almost all of Planet Earth 1.has_been__visited(visit)，described and mapped.Now we are looking outwards at the only frontier left 2.to_explore (explore)-space.

　　The age of space exploration began in 1957.Sputnik 1 and Yuri Gagarin's going into space 3.marked(mark) the beginning of the "space race" between the US and the USSR.After the Hubble Telescope 4.was_invented(invent)，another burst of interest in space was aroused.More planets are discovered.The International Space Station is now 5.being_built(build) in the Earth's orbit so as 6.to_research(research) life in space.We are only really in the initial stages of exploring space 7.but we have come a long way 8.since learning that the Earth is not flat and 9.spins(spin) in an oval－shaped orbit 10.around the sun.

　　1．You are not permitted to work if you are on a student visa.

　　如果你所持的是学生签证，你就不会被允许工作。

　　[归纳拓展]

(1)permit vt.& vi.准许，许可；n.许可证，特许证