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
上一篇: 四级考试完形填空真题精练(19)
下一篇: 四级考试完形填空真题精练(16)
高考英语看图作文专项练习3
高考英语看图作文专项练习7
高考英语重点词汇复习5
高考英语看图作文专项练习10
高考英语备考总复习:BookII Unit16《The United States of America》知识搜索与探究归纳
高考英语备考总复习:BookI Unit19《Modern agriculture》知识搜索与探究归纳
高考英语重点词汇复习4
高考英语备考总复习:BookII Unit11《Scientific achievements》知识搜索与探究归纳
高考英语看图作文专项练习2
高考英语备考总复习:BookII Unit15《Destinations》知识搜索与探究归纳
高考英语看图作文专项练习29
高考英语备考总复习:BookI Unit2《English around the world》知识搜索与探究归纳
高考英语备考总复习:BookI Unit20《Humour》知识搜索与探究归纳
高考英语重点词汇复习3
高考英语备考总复习:BookI Unit21《Body language》知识搜索与探究归纳
高考英语备考总复习:BookI Unit1《Good friends》知识搜索与探究归纳
高考英语看图作文专项练习30
高考英语备考总复习:BookII Unit13《The water planet》知识搜索与探究归纳
高考英语看图作文专项练习1
高考英语备考总复习:BookI Unit4《Unforgettable experiences》知识搜索与探究归纳