题目
utine of preparing their boats and net.() they hope for a good catch of fish.But to their () ,a horrible sight meets their still sleepy eyes.Thousands of fish have washed () dead.The cause of this mass destruction? A red tide!
Red tides are a global ().They have been observed on both the Atlantic and the Pacific coasts of the United States and Canada.They have also() in many other places.Though relatively few people are () them,red tides are not new.
In the Philippines,a red tide was first seen in the province of Bataan in 1908.Since then,red tides have been seen in many other ().A Philippines red tide expert told us that " () the fish kills,the Philippines has documented 1926 cases of dead shellfish poisoning caused by red tides."
The term "red tide" () the discoloration of water that sometimes occurs in certain areas of the ocean or sea.Although the color is often red,it may also be () of brown or yellow.The World Book Encyclopedia reports that "the discolored areas may range from () a few square yards to more than 2600 square kilometers."
What causes such discoloration? Red tides are generally caused by several () of single—celled organisms.These tiny organisms have hair—like projections which they use to () themselves in water.There are about 2000 varieties of these organisms,30 of which carry poisonous().These minute organisms usually stay in warm waters with high content of salt.
A red tide occurs when there is a sudden and rapid () of these organisms.The concentration of these organisms may () to 50000000 per quart of water! Although scientists do not fully understand why this happens.It is known that these organisms () when certain conditions simultaneously affect the water.These include abnormal weather,() temperatures,an oversupply of nutrients in the water,a generous () sunlight,and favorable water currents.When a heavy rainfall occurs,minerals and other nutrients are sometimes washed () the land into coastal waters.These nutrients can contribute to the breeding of the organisms.The result? Red tides!
1.A.As a resultB.As it isC.As expectedD.As usual
2.A.satisfactionB.disappointmentC.astonishmentD.regret
3.A.ashoreB.aboardC.asideD.across
4.A.questionB.crisisC.phenomenonD.situation
5.A.occupiedB.occurredC.acquiredD.accused
6.A.assured ofB.worried aboutC.concerned aboutD.aware of
7.A.sandy beachesB.river mouthsC.coastal areasD.reef areas
8.A.exceptB.besidesC.despiteD.without
9.A.applies toB.sums upC.copes withD.leads to
10.A.shadowsB.shadesC.shakesD.shapes
11.A,less thanB.more thanC.as much asD.as little as
12.A.componentsB.elementsC.ingredientsD.species
13.A.propelB.probeC.proceedD.prompt
14.A.materialsB.substancesC.massesD.objects
15.A.boltB.blockC.bloomD.blast
16.A.scaleB.plungeC.gaugeD.swell
17.A.accelerateB.accommodateC.accumulate D.accompany
18.A.optimumB.minimumC.maximumD.momentum
19.A.means ofB.amount ofC.way toD.account for
20.A.overB.onC.byD.from
第1题
According to the text, we can imagine that______.
A.the doctor was poor, too
B.the doctor was skilled and kind
C.the doctor was skilled but cruel
D.the doctor was glad to have got the two books
第3题
A.Right
B.Wrong
C.Not mentioned
第4题
A.Owing to
B.As a result of
C.Because of
D.Seeing
第5题
A、policemens / fishermens
B、policemen/ fishermen
C、policeman/ fisherman
D、policemans/ fishermans
第6题
A. offer
B. provide
C. give
D. bring
第7题
1 It isthe money that____- these fishermen to risk a long ocean journey.
2 A goodteacher should stimulate students to come up with____ideas inventions.
3 Withthe rapid development of the economy, ou___ of life has changed greatlythese years.
4 Shestudied almost_____ for the big test,more than 12 hours per day for nearly a month.
5 Mr.Selby is seriously ill and has been transferred to____care.
6 This isthe____hotel room we stayed in last year.
7 Afterthe applause died down , the pianist____to play.
8 Thestudents tried to____the teacher into losing her temper.
9 Theprogram deals with subjects as____pop music and Bejjing Opera.
10 If youwant to be an actor you have to really____to it.
第8题
A.人们常常对水手们讲的故事付诸笑
B.一些异常的生物偶尔会被冲到岸上来
C.渔夫和水手们有时声称自己看到过海里的妖怪
D.它们在海上却极少能被捕到
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