第二卷（共35分）
第四部分：写作（共两节，满分35分）
第一节：短文填词：（共10小题，每小题1分，满分10分）
On the one hand, the robots sent to the planets have not yet found
any ______(迹象) of life on Mars, but they have found evidence 76. __________
that water ______ freely over the planet’s surface millions of years 77. __________
ago. ______ addition, water in the form of ice exists below some 78. __________
p of the Martian surface today. 79. __________
On the other hand, d life on Mars would change the 80. __________
present view of the Universe and also give a big push toward man’s.
work there. But a group of experts o by President Barack Obama 81. __________
told him last October that US ______(太空) policy should now focus 82. __________
on sending human beings to Mars instead of ______(又一，再一) moon 83. __________
landing. Michael Griffin, a former head of NASA, believes ______ 84. __________
a human trip to Mars could be p by 2037. 85. __________