【题目】Most of us don't like to think too much about rubbish.1. However, household waste is a major contributor to our planet's waste problem. Like it or not, it needs to be managed if we are to have a brighter green future.

When it comes to being responsible for our own rubbish, the best way to approach it is by following the three golden rules of waste management, or the'3 Rs'-Reduce, Reuse and Recycle.

"The order is important.2," says Eugene Tay, Director of Green Future Solutions in Singapore. "Recycling still affects the environment and should be done last after reduce and reuse."

But, when our efforts to reduce and reuse still result in an overflowing rubbish bin, the advantages of recycling cannot be ignored. "3," says Amy Ho, Managing Director of World Wide Fund For Nature in Singapore. "The damage to our environment could then be slowed down as a result. "

In fact, by recycling just one plastic bottle, you are saving not just the material to make a new one, but you also stop it from getting thrown into a landfill(垃圾掩埋场)for up to 700 years-and that's before it even starts to rot. 4.

Recycling is so important that we really have no excuse not to do the simplest of household tasks that will make a difference.

"5," says Ho. "Starting with recycling grey water for gardening purposes, to recycling materials such as glass, paper and iron-it all reduces the use of raw materials."

A. We put it in the bin and don't think too far beyond that

B. The collective action of individuals can make a significant effect

C. It's important for every household to make good use of grey water

D. Waste reduction and reuse is usually the best way to decrease waste

E. The three rules of waste management should be followed by every household

F. Recycling reduces the use of raw materials and so protects our natural resources

G. Recycling just 10% plastic bottles would keep 90 million kilograms of plastic out of landfills

【题目】Directions: Read the following passage. Fill in the each blank with a proper sentence given in the box. Each sentence can be used only once. Note that there are two more sentences than you need.

The problem of robocalls has become so severe that many people now refuse to pick up calls from numbers they don’t know. By next year, half of the calls we receive will be scams(欺诈). We are finally waking up to the severity of the problem by supporting and developing a group of tools, apps and approaches intended to prevent scammers from getting through. Unfortunately, it’s too little, too late. By the time these “solutions” become widely available, scammers will have moved onto cleverer means. 1 Soon you will also question whether the voice you’re hearing is actually real.

That’s because there are a number of powerful voice manipulation and automation technologies that are about to become widely available for anyone to use. At this year’s I/O Conference, a company showed a new voice technology able to produce such a convincing human-sounding voice that it was able to speak to receptionist and book a reservation without detection.

2 The reason that robocalls are a headache has less to do with amount than precision. A decade of data breaches(数据侵入)of personal information has led to a situation where scammers can easily learn your mother’s name, and far more. Armed with this knowledge, they’re able to carry out individually targeted campaigns to cheat people. This means, for example, that a scammer could call you from what looks to be a familiar number and talk to you using a voice that sounds exactly like your bank teller’s, tricking you into “confirming” your address, mother’s name, and cark number. Scammers follow money, so companies will be the worst hit. A lot of business is still done over the phone, and much of it is based on trust and existing relationships. 3.

We need to deal with the insecure nature of our telecom networks. 4 That might mean either developing a uniform way to mark videos and images, showing when and who they were made by, or abandoning phone calls altogether and moving towards data-based communications -- using apps like FaceTime or WhatsApp, which can be tied to your identity.

Credibility is hard to earn but easy to lose, and the problem is only going to get harder from here on out.

A. Voice manipulation technologies may weaken that gradually.

B. There are many challenges in robotics that need to be addressed in order to solve the voice manipulation and assembly problems.

C. In the near future, it’s not just going to be the number you see on your screen that will be in doubt.

D. It’s high time that the government should spare no effort to tackle the problem immediately.

AB. Phone carriers and consumers need to work together to find ways of determining and communicating what is real.

AC. Those developments are likely to make our current problems with robocalls much worse.

【题目】 City trees grow faster and die younger than trees in rural forestry, a new study finds. Over their lifetimes,then, urban trees will likely absorb less CO2 from the air thah forest trees.

As we all know, the earth would be freezing or burning hot without C02. However, CO2 is a greenhouse gas, meaning it traps energy from the sun as/heat. That makes temperatures near the ground rise. Human activities, especially the widespread burning-of fossil(化石)fuelshave been sending extra greenhouse gases into the air. This has led to a rise in average temperatures across the globe.

Studies had shown forests readily absorb C02but there hadn’t been much data on whether city trees grow die and absorb CO2 at the same rate as forest trees do. So some researchers decided to find out.

To figure out how quickly trees were growing, researchers tracked their diameters (the width of their trunks) between 2005 and 2014. A tree’s diameter increases as it grows, just as a person’s waist size increases as they gain weight. About half the weight of a tree is carbon, research has shown. Most of the rest is water. Over the nine years’ tracking, the researchers found city trees absorbed four times as much carbon from the air as forest trees. However, they were twice as likely to die. So over the lifetime of each type of tree, forest trees actually absorbed more C02.

City trees grew faster because they had less competition for light from their neighbors. In a foresttrees tend to grow close togethershading their neighbors. Street trees also benefit from higher levels of nitrogen (氮)in rainwater. Nitrogen helps plants grow. Waste gases from gas-burning cars also contain nitrogen, thus enriching city air with nitrogen. Later, rainwater may wash much of it to the ground. Some street trees may also have better access to water than trees in the country because the underground water pipes can leak.

1What can he known about CO2 from paragraph 2?

A.It is one of the side effects of greenhouses.

B.It greatly accelerates the process of global warming.

C.It results from the widespread burning of fossil fuels.

D.It prevents the earth from becoming unsuitable to live on.

2Why did researchers track the diameters of trees?

A.To know about their growth rates.

B.To find out how much they weigh.

C.To check whether they were healthy.

D.To assess the carbon amounts in them.

3What advantage do city trees have over forest trees?

A.They are more likely to access growth promoters.

B.They can enjoy more water coming from the air.

C.They can enjoy more shade from neighbors.

D.They are better at competing for light.

4What will probably be talked about if the passage is continued?

A.How urban trees can live longer.

B.Why city living makes trees die young.

C.How trees respond to dry soil conditions.

D.Why faster-growing trees absorb more C02.

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