1 .		When Percival Lowell an early 20th century American astronomer observed Mars through a telescope, he thought he saw a vast network of canals.    [an early 20th-century American astronomer]   (an early 20th-century American astronomer)   --an early 20th-century American astronomer--
2 .		He hypothesized that Mars had the following features in common with Earth water, vegetation, and at some time in the past, intelligent life.    Earth; water   Earth--water   Earth: water
3 .		The report cited earlier missions only indirectly: "However, three space probes in the 1960’s the Mariner missions revealed that Mars had no canals, vegetation, or water."    [the Mariner missions]   (the Mariner missions)   /the Mariner missions/
4 .		With its distant orbit 140 million miles from the sun and its thin, largely carbon-dioxide atmosphere, Mars has a harsh environment.    No change   (140 million miles from the sun)   ...140 million miles from the sun...
5 .		The Mariner and later the Viking missions did find evidence that Mars has had a complicated climatic history one punctuated with warm periods.    history--one punctuated with warm periods   history: one punctuated with warm periods   history...one
6 .		Furthermore, researchers have found the other evidence characteristic of glacial landscapes, such as boulder-like ridges of sediment, meandering lines of sand and or gravel, and "rock glaciers," like those found in Alaska.    and--or   and/or   and, or
7 .		Researchers have also found long channels emanating from "chaotic terrain" regions of fractured rocks that may have collapsed when groundwater broke suddenly through the surface.    --regions of fractured rocks--   /regions of fractured rocks/   [regions of fractured rock]
8 .		Once this water rushed to the surface and mixed with the carbon dioxide in the atmosphere, a carbonated sea a Martian seltzer may have been created.    --a Martian seltzer--   (a Martian seltzer)   [a Martian seltzer]
9 .		Some believe Mars may have had more than channels, lakes, and seas there may have been a Martian ocean.    seas (there may have been a Martian ocean).   seas, there   seas: there may have been a Martian ocean.
10 .		Further evidence of water on Mars comes from Soviet space probes, which revealed oxygen and hydrogen atoms derived from the breakdown of water exposed to sunlight streaming away from Mars.    [derived from the breakdown of water exposed to sunlight]   --derived from the breakdown of water exposed to sunlight--   sunlight: streaming
11 .		A quantity of the carbon dioxide a potent greenhouse gas also appears to have escaped from Mars into space.    "a potent greenhouse gas"   --a potent greenhouse gas--   [a potent greenhouse gas]
12 .		Many questions remain about water on Mars Was there an ocean? When was Mars wet? How long was it wet?    Mars: Was   Mars--Was   Mars? Was
13 .		One researcher believes that Mars may have had water on its surface as recently as 300 million years ago a relatively short time in the history of our solar system.    surface: as   ago: a relatively   ago--a relatively
14 .		"Recent experiments on Martian meteorites such as the one found in Antarctica raise the possibility that primitive forms of life may have existed on Mars in its distant past."    /such as the one found in Antarctica/   such as, the   [such as the one found in Antarctica]
15 .		While the question of whether Mars had life remains unanswered, evidence indicates that at some time in its past Mars had the right combination of conditions for life a relatively warm climate, water, geysers and/or hot springs.    life: a   life/a   and--or
16 .		The reason for Lucy’s strange behavior was clear she was using drugs again.    clear:   reason:   was:
17 .		I have chosen three courses for next semester World History, Economics, and Abnormal Psychology.    semester:   courses:   History: Economics:
18 .		Here’s a list for the grocery store milk, bread, juice, and eggs.    list:   store:   for:
19 .		The meeting will begin at _____ sharp.    7/30   7:30   7-30
20 .		The passage comes from John 3 16.    John: 3,   from:   3:16
21 .		I can’t go for two reasons I don't have the time, and I don’t have the money.    time:   and:   reasons:
22 .		Please bring the following items on the trip a sleeping bag, hiking boots, and a warm hat.    following:   trip:   items:
23 .		In her recent book Dr. Marjorie Boynton discusses the declining number of adoptions "Many couples spend huge sums of money on fertility treatments without even considering the alternative of adoption."    discusses:   adoptions:   alternative:
24 .		The choices for the banquet menu are as follows vegetable lasagna, baked scrod, or pasta primavera.    choices:   menu:   follows:
25 .		The visiting team had characteristics we didn’t speed, strength, and preparation.    didn’t:   characteristics:   team: