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. __________