Seeing
To be seen
Seen
Having seen
第1题：
The article suggests that______.
A. our earth exists before the sun
B. how space formed
C. no one knows where the earth comes from
D. our earth used to be part of a high mountain on the sun
48．答案为D 从最后一段及its tidal pull had become so powerful that this mountain was torn to pieces and threw off small parts of itself into space可推断地球也是在太阳爆炸的小碎片中形成的。
第2题：
According to the passage, the earth in its very early period was ______.
A. in molten state
B. in water state
C. in rock state
D. a vast ocean
42．答案为A。根据第一段第二、三句，the earth at some time in its very early history became hot enough to melt the materials from which it was formed。While in this molten state作出该项选择。
第3题：
A. Seen
B. Seeing
C. To see
D. See
第4题：
A.that
B.as
C.which
D. then
第5题：
A. Seen…covered
B.Seeing…covering
C.Seen…covering
D.To see…to cover
第6题：
Passage Three
Many theories about the origin of the ocean have been proposed by scientists. The most widely accepted one is that the earth at some time in its very early history became hot enough to melt the materials from which it was formed. While in this molten state, lighter rock-forming materials (造岩材料) floated on the surface of the heavier ones. Then, between four and a half four billion (十亿) years ago, the molten earth cooled sufficiently to form. a crust of rock that was many miles thick.
Surrounding the earth was an unbroken canopy of clouds miles thick and made up mostly of water vapor. Rain falling toward the still-hot earth was heated to steam and rose to the clouds again. After many millions of years, as the earth continued to cool, its surface temperature fell below the boiling point of water. Rainwater could now remain on the earth, covering its whole surface except for the higher places on earth that had been formed from the lighter rock materials.
In 1970, scientists had pieced together evidence that the lighter rock materials had formed one huge continent by a vast ocean. Then, about 200 million years ago, the great continent began to break up, the pieces moving slowly apart.
The onrushing waters of the single huge ocean now entered and filled the spaces between the separating continents--and became the several oceans and seas we know today.
41. This passage mainly talks about ______.
A. the origin of the earth
B. the origin of the ocean
C. the history of the earth
D. the forming of the earth's crust
41．答案为B。根据第一段第一、二句，Many theories about the origin of the ocean have been proposed by scientists．The most widely accepted one is that...作出该项选择。
第7题：
It can be learned from the passage that about four billion years ago ______.
A. the earth was in molten state
B. the earth surface temperature was above 100℃
C. the earth surface temperature was below 100℃
D. rain water could remain on the earth
43．答案为B。根据第一段最后一句及第二段内容可知，雨水在地表温度降到水的沸点以下才能停在地表，由此可知大约在四十亿年前，地表温度应在沸点以上。
第8题：
What do we know about golf from the passage?
A. It is popular in Portugal and Spain.
B. It causes water shortages around the world.
C. It pollutes the earth with chemicals and wastes.
D. It needs water and electricity to keep its courses green.
第9题：
Emily Dickinson’s poetry is unique and unconventional in its own way, covering love, death and nature.()
第10题：
_________ from space, the earth looks like a blue ball.
A、Seeing
B、Seen
C、To see
D、See