由于中国太空计划的快速发展，这可能会提前而不会推迟完成。

　　【答案】　1.with the US putting a man on the moon

　　2．so that　3.in case　4.rather than

　　　阅读P26课文，并从四个选项中选择最佳答案

　　1．Human began to explore space in________.

　　A．1957　　 B．1961　　

　　C．1969　　 D．1970

　　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

　　D．the number of manned flights dropping off

　　3．Human beings first set foot on the moon in________.

　　A．1957 B．1961

　　C．1969 D．1990

　　【答案】　1－3　ABC

　　　阅读P26课文，在空白处填入适当的内容(1个单词)或括号内单词的正确形式

　　By the beginning of the 21st century, almost all of Planet Earth 1.________ (visit), described and

　　mapped. Now we are looking outwards at the only frontier left 2.________ (explore)-space.

The age of space exploration began in 1957. Sputnik 1 and Yuri Gagarin' s going into space 3.________ (mark) the beginning of the "space race" between the US and the USSR. After the Hubble Telescope was invented, another burst of interest in space was aroused. 4.________(many) planets are discovered. The 5.________(national) Space Station is now being built in the Earth's orbit so as to research life in space. We are only really in the initial 6.________(stage)of exploring space 7.________ we have