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Pure water lacks taste and smell. All living things need water in order to survive. Forty to ninety
percent of the weight of all organisms is water. The human body uses water to remove wastes and transport food throughout the body. Ancient philosophers thought of water as a true building block by which all other liquids are measured. Until the late eighteenth century a British chemist by the name of Cavendish made water by using a mixture of two main elements: hydrogen and oxygen. Now, we know that water consists of two parts: hydrogen, the most plenty element in our universe, and oxygen, the element that we breathe in order to survive.

49.According to the passage, which of the following is true?

A)Water smells like apples.
B)All living beings require water.
C)Water smells like an orange juice.
D)Nobody has made water yet.
50. According to the passage, how does water help your body?
A)It cures your body from injuries.
B)It provides your lungs with oxygen.
C)It protects you from shock.
D)It transports food.
51. According to the passage, what is the most plenty element in the universe?
A) food B) water C) oxygen D) hydrogen
52. According to the passage, water is made of hydrogen and . . . .
A) hydrogen B) waste C) oxygen D) water
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Clownfish is a little fish that comes in many colours like yellow, red, and black. There are 28 types of clownfish. They can be found in the Red Sea and the Pacific and Indian oceans. In fact, the clownfish will not move more than twenty centimetres away from their homes during their entire lives. Clownfish are also called "anemone fish" because they live within sea anemones. These two animals are the best friendsfriends becausebecause they help each other. Sea anemones look like flowers. The sea anemones sting their prey with their tentacles, long thin parts of their body that are used for holding things. The poison on the tentacles stings the fish so that the sea anemones can hold them. However,clownfish are protected from this poison by a substance that covers their bodies. The food left by the sea anemone is eaten by the clownfish. In return, the clownfish cleans the anemone by eating its dead tentacles and by scaring away animals that might hurt the sea anemone.

53.According to the passage, how many types of clownfish are there?

A) twenty-three B) nine C) twenty D) twenty-eight
54. According to the passage, where can we find clownfish?
A) Both in the Pacific and Indian oceans.
B) Only in the Red Sea.
C) Only in the Indian Ocean.
D) Both in the Arctic and Atlantic oceans.
55. According to the passage, why isn’t a clownfish stung by the sea anemone?
A) Because it is too small to be stung.
B) Because it swims in a strange way.
C) Because it has a specific protection.
D) Because it never approaches sea anemone.
56. According to the passage, what happens to the
food left by the sea anemone?
A) It’s eaten by the clownfish.
B) It decays in several minutes.
C) It covers clownfish’s body.
D) It’s used as soil for flowers.