Today, most countries in the world have canals.Many countries have built canals near the coast, and parallel 1 the coast.Even in the twentieth century, goods can be moved more cheaply by boat than by any other 2 of transport.These 3 make it possible for boats to travel 4 ports along the coast without being 5 to the dangers of the open.Some canals, such as the Suez and the Panama, save ships weeks of time by making their 6 a thousand miles shorter.Other canals permit boats to reach cities that are not 7 on the coast, still other canals 8 landsswheresthere is too much water, help to 9 fields wherethere is not enough water, and 10 water power for factories and mills.The size of a canal 11 on the kind of boats going through it.The canal must be wide enough to permit two of the largest boats using it to 12 each other easily.It must be deep enough to leave about two feet of water 13 the keel of the largest boat using the canal.When the planet Mars was first 14 through a telescope, people saw that the round disk of the planet was criss-crossed by a 15 of strange blue-green lines.These were calledcanals 16 they looked the same as canals on earth 17 are viewed from an airplane.However, scientists are now 18 that the Martian phenomena are really not canals.The photographs 19 from space-ships have helped us to 20 the truth about the Martiacanals.
1.A.off B.with C.to D.by
2.A.way B.means C.method D.approach
3.A.waterways B.waterfronts C.channels D.paths
4.A.among B.between C.in D.to
5.A.revealed B.exposed C.opened D.shown
6.A.trip B.journey C.voyage D.route
7.A.lain B.stationed C.set D.located
8.A.escape B.drain C.dry D.leak
9.A.water B.wet C.soak D.irrigate
10.A.furnish B.afford C.offer D.give
11.A.focuses B.bases C.depends D.takes
12.A.cross B.pass C.move D.advance
13.A.down B.below C.beneath D.off
14.A.studied B.researched C.surveyed D.observed
15.A.few B.number C.deal D.supply
16.A.although B.because C.so D.if
17.A.that B.where C.when D.as
18.A.exact B.definite C.certain D.decisive
19.A.held B.taken C.got D.developed
20.A.find B.expose C.uncover D.discover
GRE出国考试词汇辅导:GRE反义词总结(中)
GRE词汇 动词同义的词汇介绍(七)
新GRE词汇复习资料:asperity
新GRE词汇复习资料:audacious
GRE词汇 动词同义的词汇介绍(八)
GRE词汇 动词同义的词汇介绍(十三)
新GRE词汇复习资料:Invective
新GRE词汇复习资料:desiccate
新GRE词汇复习资料:pariah
GRE常考600单词(9)
GRE词汇 动词同义的词汇介绍(十二)
新GRE词汇复习资料:contaminated
新GRE词汇复习资料:indolent
新GRE词汇复习资料:soporific
GRE词汇 动词同义的词汇介绍(二十五)
有中国特色的常用词汇九
新GRE词汇复习资料:imperial
GRE出国考试词汇辅导:GRE单词记忆新法(3)
新GRE词汇复习资料:tenuous
GRE词汇 动词同义的词汇介绍(三)
GRE词汇 动词同义的词汇介绍(二十二)
比较难以记住的GRE词汇
新GRE词汇复习资料:auspicious
GRE词汇 动词同义的词汇介绍(十八)
GRE词汇 动词同义的词汇介绍(二)
GRE词汇 动词同义的词汇介绍(十六)
新GRE词汇复习资料:vacillation
新GRE词汇复习资料:dirge
GRE词汇 动词同义的词汇介绍(九)
新GRE词汇复习资料:diffidence
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