Mars is not, it seems, the dry old
planet we once believed it to be. Astronauts who are {{U}} (1) {{/U}} to
go there in the next decade may find plenty {{U}} (2) {{/U}} water to
slake(消除) their thirst. And with water present the {{U}} (3)
{{/U}} of finding some sort of life on Mars are {{U}} (4) {{/U}}
brighter. This is the view of 40 {{U}} (5) {{/U}} all
over the world who have been analyzing {{U}} (6) {{/U}} of pictures and
other scientific {{U}} (7) {{/U}} obtained by robot explorers in the
sixties and seventies. To begin with, scientists thought the Red
Planet was as {{U}} (8) {{/U}} as the Moon with dust storms swirling over
vast sandy {{U}} (9) {{/U}}. But now the picture is very different with
mountains and valleys carved by {{U}} (10) {{/U}} glaciers and torrential
rivers rushing and rumbling deep underground.< A. lots B. quantifies C. thousand D. thousands
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Mars is not, it seems, the dry old
planet we once believed it to be. Astronauts who are {{U}} (1) {{/U}} to
go there in the next decade may find plenty {{U}} (2) {{/U}} water to
slake(消除) their thirst. And with water present the {{U}} (3)
{{/U}} of finding some sort of life on Mars are {{U}} (4) {{/U}}
brighter. This is the view of 40 {{U}} (5) {{/U}} all
over the world who have been analyzing {{U}} (6) {{/U}} of pictures and
other scientific {{U}} (7) {{/U}} obtained by robot explorers in the
sixties and seventies. To begin with, scientists thought the Red
Planet was as {{U}} (8) {{/U}} as the Moon with dust storms swirling over
vast sandy {{U}} (9) {{/U}}. But now the picture is very different with
mountains and valleys carved by {{U}} (10) {{/U}} glaciers and torrential
rivers rushing and rumbling deep underground.< A. biologists B. geologists C. sociologists D. psychologists
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