Diamonds are the most famous and valuable jewel (珠宝) in the world. It is difficult to cut a diamond because it is the
When a volcano (火山)
There are not many places that
The earliest known diamonds were found in India many centuries ago. But most of the world’s diamonds now come from the Congo, Tanzania and South Africa.
1.A.weakest | B.simplest | C.hardest | D.darkest |
A.value | B.colour | C.light | D.smell |
A.secretly | B.widely | C.hardly | D.quietly |
A.active | B.special | C.relaxed | D.missing |
A.mark | B.time | C.step | D.chance |
A.important | B.difficult | C.happy | D.possible |
A.cut | B.slowed | C.washed | D.turned |
A.borrow | B.produce | C.spend | D.collect |
A.talked about | B.picked up | C.took away | D.died of |
A.stayed | B.built | C.returned | D.brought |
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【推荐1】There are two sides of a mobile phone. At present, almost everyone has a mobile phone, but have you ever thought that cell phone might be
This study shows that people who use cell phones for about an hour a day have a shorter time
Researchers studied 100 people who
Besides this, our ears have many little
A.good | B.fine | C.bad | D.well |
A.shows | B.tells | C.thinks | D.gets |
A.saying | B.watching | C.hearing | D.talking |
A.easily | B.especially | C.suddenly | D.carefully |
A.her | B.you | C.him | D.them |
A.during | B.between | C.in | D.at |
A.used | B.use | C.wrote | D.write |
A.Why | B.Which | C.Who | D.What |
A.surprise | B.rules | C.problems | D.words |
A.hairs | B.pains | C.sounds | D.blood |
A.live | B.alive | C.rise | D.die |
A.All in all | B.However | C.Firstly | D.Finally |
A.to | B.with | C.about | D.of |
A.buy | B.use | C.discover | D.see |
A.beautiful | B.soft | C.loud | D.light |
【推荐2】Man began to make use of fire long long ago. Fire is useful in many ways, but sometimes it is dangerous. If you are not careful with it, it can burn things or
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1.A.always | B.still | C.even |
A.change | B.cause | C.caused |
A.not smoke | B.not to smoke | C.don't smoke |
A.and | B.or | C.but |
A.put | B.putting | C.to put |
A.it | B.this | C.that |
A.ways | B.things | C.shapes |
A.air | B.smoke | C.fire |
A.more | B.few | C.less |
A.quickly | B.slowly | C.early |
A.can't | B.needn't | C.mustn't |
A.you | B.yours | C.yourself |
A.In | B.On | C.At |
A.where | B.when | C.how |
A.perhaps | B.may be | C.maybe |
Often, young children are easily
Don’t go to bed late because of a nice TV program, or you may go to school
A.for | B.at | C.on | D.about |
A.and | B.while | C.but | D.or |
A.school | B.lessons | C.films | D.listening |
A.happy | B.upset | C.tired | D.excited |
A.begin with | B.play with | C.deal with | D.do with |
A.what | B.which | C.why | D.who |
A.skills | B.lessons | C.ways | D.strategies |
A.early | B.late | C.on time | D.slowly |
A.leave | B.make | C.keep | D.push |
A.decision | B.energy | C.knowledge | D.self-control |
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A.material | B.history | C.shape |
A.ugliest | B.finest | C.earliest |
A.bag | B.pocket | C.box |
A.However | B.Such as | C.For exmple |
A.before | B.later | C.ago |
A.experiences | B.pictures | C.dreams |
A.produced | B.came | C.appeared |
A.designs | B.wheels | C.clothes |
A.full | B.filled | C.poured |
A.how | B.what | C.which |
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In 1888, Adams gave a
A.eaten | B.polluted | C.sold | D.invented |
A.in public | B.by mistake | C.in person | D.by hand |
A.ancient | B.single | C.famous | D.sick |
A.products | B.records | C.crops | D.fruits |
A.agreed | B.preferred | C.failed | D.afforded |
A.angry | B.nervous | C.lucky | D.satisfied |
A.Usually | B.Surprisingly | C.Slowly | D.Clearly |
A.dish | B.meal | C.drink | D.treat |
A.method | B.name | C.prize | D.menu |
A.divided | B.stored | C.developed | D.repeated |
【推荐3】Beautiful pictures of mountains and forests, clear skies, flying birds, wild animals, silly faces — you can find them all in one place.
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A.How | B.When | C.Why | D.Where |
A.liked | B.hated | C.found | D.lost |
A.advice | B.picture | C.idea | D.card |
A.above | B.with | C.under | D.for |
A.happened | B.changed | C.ended | D.appeared |
A.even | B.only | C.still | D.ever |
A.note | B.word | C.address | D.letter |
A.on the front | B.on the back | C.on the left | D.on the right |
A.surprised at | B.interested in | C.expected by | D.worried about |
A.first | B.second | C.third | D.fourth |
When you turn on the tap in your house, water comes out. This water has
Most of the water on the earth is in the
There are parts of the world where there is
A.pulled | B.walked | C.rushed | D.travelled |
A.way | B.path | C.method | D.condition |
A.stream | B.ocean | C.river | D.lake |
A.takes in | B.gives off | C.heats up | D.cools down |
A.purple | B.grey | C.blue | D.pink |
A.through | B.with | C.as | D.by |
A.it | B.that | C.this | D.what |
A.few | B.much | C.enough | D.little |
A.behind | B.alone | C.off | D.out |
A.rapid | B.cheap | C.simple | D.expensive |
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A.invites | B.manages | C.includes | D.continues |
A.colors | B.shapes | C.smells | D.fields |
A.repair | B.touch | C.spread | D.study |
A.set up | B.take down | C.work on | D.carry out |
A.carefully | B.straightly | C.successfully | D.necessarily |
A.steps | B.changes | C.choices | D.notices |
A.afford | B.suggest | C.prevent | D.provide |
A.After all | B.At first | C.Without doubt | D.Instead of |
A.environment | B.activity | C.business | D.information |
A.thankful | B.active | C.useful | D.strange |
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An ecologist once asked a boy
The boy said, “You go into the forest and look for somebody who wants to cut down a tree. You take away his axe. You tell him about how
“ Good answer,” said the ecologist, “
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1.A.proved | B.invented | C.marked | D.accepted |
A.planet | B.building | C.project | D.surface |
A.feeling | B.relationships | C.distance | D.competitions |
A.pollute | B.control | C.include | D.reduce |
A.who | B.whose | C.why | D.what |
A.wild | B.common | C.wealthy | D.important |
A.but | B.and | C.so | D.or |
A.comfortable | B.tiring | C.impossible | D.necessary |
A.mystery | B.temperature | C.balance | D.symbol |
A.soil | B.resources | C.landscape | D.wildlife |