will you possibly( be )a doctor? 原因?

C
LONDON: What could possibly be wrong with planting trees? The benefits are obvious; they firm the soil, soak up (摄取) extra water and take carbon dioxide (二氧化碳) our of the atmosphere.
However, it now turns out that planting trees could add to global warming.
Tree roots do a great job of keeping soil firmly on the ground and out of the wind’s power. The problem is that some of those dust clouds play an important part in soaking up carbon dioxide.
Huge dust storms blow out over the oceans from dry parts of North Africa and central Asia. Tons of dust are lifted and left as a thin film over the ocean surface. The dust fuels oceanic life.
Dust from China is carried east and left in the Pacific Ocean. If a tree-planting programme there is successful and the dust supply reduced, the net result may be that less carbon dioxide gets locked away in the ocean.
Andy Ridgwell, an environmental scientist from the University of East Anglia, has spent the past few years studying dust and says his work “shows clearly that the complexity of the system and the importance of not tinkering(粗劣地修补) with it without understanding the results. For this reason the need is to focus(集中) on cutting carbon dioxide giving off rather than monkeying (瞎弄) about with the land surface.”
An American scientist, Robert Jackson, has shown that when native grassland areas are invaded(侵入) by trees, carbon is lost from the soil. “We are studying why the soil carbon disappears, but one theory is that trees do a lot more of their growing above ground compared to grasses, so less carbon goes directly into the soil from trees, ” says Jackson.
In wet areas of the world, the gain from trees absorbing carbon dioxide above ground seems to be outweighed(超过) by the loss of carbon from the soil below ground. Countries that plan to combat global warming by planting trees may have to think again.
Solutions to environmental problems are often more complex than they first appear, and understanding the Earth’s climate is a very great challenge.
63．People usually hold the opinion that .
A．huge dust storms can destroy carbon dioxide

B．huge dust storms can destroy the oceans on the earth

C．huge dust storms can’t do anything beneficial for man

D．planting trees is the only way to control huge dust storms
64．Andy Ridgwell, the environmental scientist, believes that .
A．dust plays a more important part than trees

B．trees should’t have been planted in dry places

C．carbon dioxide is harmful to everything on the earth

D．environmental problems are more complex than expected
65．Robert Jackson’s experiment proves that .
A．grassland areas should be covered by forests

B．trees hold more carbon than grasses

C．carbon can turn grass into dust

D．less carbon can make trees grow faster
66．The underlined word “combat” in the last paragraph means .
A．learn about B．fight against C．live with D．give up

Possibly encouraged by Liu Xiang, a number of students want to have a try in the hurdle race.

A．110-meter-long	B．110-meters-long
C．110-meter length	D．110 meters length

[ ]

小题1: __ One of the best things you can possibly do is to start you own club．It’s great fun especially if you are the sort of person who feels there’s never anything to do during the school holidays．
The first thing you need to come up with is an idea for your club． 小题2: . Pets, clothes, pop music or dancing groups, sports, making things? The list is endless．
Next you need some friends to be in your club with you． 小题3: . All you need is three or four other people who are interested in the same thing as you．
小题4: . You should all sit down somewhere together with lots of pieces of paper and write down every name you can think up．That’ll keep you busy for ages．
At your first meeting you should make up a rule book．And the first rule should be no grown-ups or little/big brothers or sisters! The best clubs are always secret!
Now you have just about everything you need, except membership cards．These are very important and again you can spend a lot of time making them． 小题5: .Why not leave some space for a photo of yourself? That will make the membership card really look like it．
So there you are, get clubbing! Once you get started you’ll think of loads of more interesting things to do!

A．That’s easy．

B．Enjoy your own club!

C．Invite a designer to join you．

D．What are you interest in?

E. Some vacation is coming．
F. Then you need to pick a name for your club．
G. Use a bright thick pen to make a special design．

How can you possibly miss the news? It ________ on TV all day long.

A．has been

B．had been

C．was

D．will be

We can’t possibly go. _________ with it’s too far and we can’t afford it either.

A．To begin

B．Beginning

C．Begin

D．Having begun