Natural (3) _______ are grouped into two categories, renewable and nonrenewable.

Conservation activities for nonrenewable resources focus (2) _______ maintaining an adequate supply of these resources well into the future.

In many countries around the Mediterranean Sea a (2) ___________ kiss on the cheek is the appropriate way to welcome friends and family.

A housework robot on the other hand, has to do several different (3)________ of cleaning and carrying jobs and also has to cope (4)________ all the different shapes and positions of rooms, furniture, ornaments, cats and dogs.

A great thing to see at the British Museum is the collection of mummies, tomb (3) _______, and gold jewelry from ancient Egypt.

However, he was color blind, so he had to rely on the eyes of his assistant, who could easily (3)________all the seven colors: red, orange, yellow, green, blue, indigo and violet. His assistant could
also clearly tell the difference between indigo and violet. There are two types of rainbows. Primary rainbows are the most common and have the most distinctive colors, with red appearing on the outside of the arc and violet on the inside.

Simply asking questions like “What will my students need dozens of years from now?” or “How can I help give them those skills?” can change teachers' (5)______, make them a leader, and bring about changes in the classroom, school and community.

In addition, drivers could be required to pay for using particular routes at different times of the day. This system, also known as ‘road pricing’, is already being introduced in a number of cities, using a special electronic card (4) ________ to windscreen of the car. Another ways of dealing with the problem is to provide cheap parking on the outskirts of the city, and strictly control the number of vehicles allowed into the centre.

Last year thieves broke into a Scottish stately home and stole only one thing: a rhino horn trophy, which at 1.5 meters was the longest in the world. Meanwhile, in China, pharmaceutical factories have been building up (1)___________ of antiques made from rhino horn, for the sole purpose of smashing them to powder to make the (2)___________ ingredient of many of their medicines. And in Zimbabwe, 34 poachers died in 1990 in the search for the black rhino. Recently, conservationists met to (3)___________a campaign to persuade countries where rhino horn is still part of the traditional medicine to switch to substitutes. The biggest threat to the survival of the rhinoceros is the refusal of certain countries to enforce a ban on domestic trading in rhino horn. The rhino horn is included in many doses for disorders raging from fevers to nosebleeds. Horn, like fingernails, is made of keratin and has no proven medicinal (4)___________. Traditional substitutes, such as horn from buffalo or antelope, are regarded as second best. The battle is thought to be winnable. But it may be harder than the battle against the trade in ivory, for there is a (5)___________between the two commodities. Ivory is a luxury; rhino horn, people believe, could save the life of their child

In Britain schools have to (2)_____ meals at lunchtime. Children can choose to bring their own food or have lunch at the school canteen. One shocking finding of this research is that school meals are much healthier than lunches prepared by parents.

There are many superstitions in Britain, but one of the most (1) ______ held is that it is unlucky to walk under a ladder even if it means (2)______the pavement into a busy street! If you must pass under a ladder, you can avoid bad luck by crossing your fingers and keeping them crossed until you have seen a dog. (3) ______, you may lick your finger and make a cross on the toe of your shoe, and not look again at the shoe until the mark has dried. Another common superstition is that it is unlucky to open an umbrella in the house - it will either bring (4)______ to the person who opened it or to the whole (5) ______. Anyone opening an umbrella in the fine weather is unpopular, as it inevitably brings rain