Directions: There are 20 blanks in the following passage. For each blank there are four choices marked [A], [B], [C] and [D] on the right side of the paper. You should choose the ONE that best fits into the passage. Then mark the corresponding letter on Answer Sheet 2 with a single line through the center.

　　Today, most countries in the world have canals. Many countries have built canals near the coast, and parallel 67 the coast. Even in the twentieth century, goods can be moved more cheaply by boat than by any other 68 of transport. These 69 make it possible for boats to travel 70 ports along the coast without being 71 to the dangers of the open. Some canals, such as the Suez and the Panama, save ships weeks of time by making their 72 a thousand miles shorter. Other canals permit boats to reach cities that are not 73 on the coast; still other canals 74 lands where there is too much water, help to 75 fields where there is not enough water, and 76 water power for factories and mills. The size of a canal 77 on the kind of boats going through it. The canal must be wide enough to permit two of the largest boats using it to 78 each other easily. It must be deep enough to leave about two feet of water 79 the keel of the largest boat using the canal. When the planet Mars was first 80 through a telescope, people saw that the round disk of the planet was crises-crossed by a 81 of strange blue-green lines. These were called "canals" 82 they looked the same as canals on earth 83 are viewed from an airplane. However, scientists are now 84 that the Martian phenomena are really not canals. The photographs 85 from space-ships have helped us to 86 the truth about the Martian "canals".

　　67. [A] off [B] with [C] to [D] by

　　68. [A] way [B] means [C] method [D] approach

　　69. [A] waterways [B] waterfronts [C] channels [D] paths

　　70. [A] among [B] between [C] in [D] to

　　71. [A] revealed [B] exposed [C] opened [D] shown

　　72. [A] trip [B] journey [C] voyage [D] route

　　73. [A] lain [B] stationed [C] set [D] located

　　74. [A] escape [B] drain [C] dry [D] leak

　　75. [A] water [B] wet [C] soak [D] irrigate

　　76. [A] furnish [B] afford [C] offer [D] give

　　77. [A] focuses [B] bases [C] depends [D] takes

　　78. [A] cross [B] pass [C] move [D] advance

　　79. [A] down [B] beneath [C] below [D] off

　　80. [A] studied [B] researched [C] surveyed [D] observed

　　81. [A] plenty [B] number [C] deal [D] supply

　　82. [A] although [B] because [C] so [D] if

　　83. [A] that [B] where [C] when [D] as

　　84. [A] exact [B] definite [C] certain [D] decisive

　　85. [A] held [B] taken [C] got [D] developed

　　86. [A] find [B] expose [C] uncover [D] discover