You cannot see any object unless light from that object gets into your eyes. Some of the things (1) you see give off light of their own. The sun, the stars, and a lighted lamp are examples (2) can be seen by their own light. Such things are luminous. Most of the things (3) you see are not giving off light of their own. They are simply reflecting light (4) falls on them from the sun or some other luminous body. The moon, for example, does not give off any light of its own. It is non-luminous. The reason (5) you see it is that sunlight falls on it and some of it reflects in our direction. So moonlight is only second-hand sunlight.
When you look at a book, it sends to your eyes some of the light (6) falls on it, and you see the book. If light could be kept out from the place (7) you are so that there would be no light for the book to reflect, then you could not see the book even with your eyes wide open.
Light travels so fast that the time in (8) it travels from the book (9) you are reading to your eyes is so short as if there were no time at all. Light reaches us from the moon, (10) is about 380,000 kilometers away, in only a little more than a second.
Key: 1.that 2.which 3.that 4.which 5.why 6.that 7.where 8.which 9.that 10.which
(B)
Police who raided the London shop (1) more than 100 “shahtoosh” shawls were found came from the wildlife Crime Unit. This is a special group (2) job is to find products which are made from protected animal species and (3) are sold illegally in London.
The Tibetan antelope is not the only animal (4) body parts are worth a lot of money. The skins of reptiles, (5) are used for bags and shoes, and fur from many endangered species, (6) is used to make coats, are just two more examples. But the trade also involves live animals. There are many people (7) want to have an unusual pet, and are ready to pay high prices for an animal (8)has been imported illegally.
Since 1995, (9) it was created, the Wildlife Crime Unit has tried to explain to Londoners—especially shopkeepers---- the reasons (10) animals must be protected.
Key: 1. where 2. whose 3. which 4. whose 5. which 6. which 7. who 8. which 9. when 10. why
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