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Unseen Passage- Read the extract and complete the activities given below: (12 Marks)       Oil is one of the world's major sources of energy. We depend on it as fuel for heating, transport and generation of power.     For centuries, animal and vegetable oils have been used for cooking and as a source of artificial light. But it is mineral oil which makes most of the world's needs today.       Crude mineral oil comes out of the earth as a thick brown or black liquid with a strong smell. It is a complex mixture of of many different substances, each with its own individual qualities. Most of them are combinations of hydrogen and carbon in varying proportions. Such hydro-carbons are also found in other forms such as bitumen, asphalt and natural gas. Mineral oil originate from carcasses of tiny animals and from plants that live in the sea. Over millions of years dead creature from large deposits under the sea bed and ocean currents cover then with...

 Do as Directed 1. Plants and animals seldom find the ideal surroundings. (Use past perfect tense) Ans- Plants and animals had seldom found the ideal surroundings. 2. They are inspired by ideas and theories. (Use past perfect tense) Ans- They had inspired by ideas and theories. 3. We were searching for a new game. (Use Simple Present tense) Ans- We search for a new game. 4. They was not serious about their work. (Spot the error) Ans- They were not serious about their work. 5. Michael Dell is one of the most richest person in the world. (Spot the error) Ans- Michael Dell is one of the richest person in the world.  6. . I usually asks my employees to be punctual in their tasks. ( Spot the error) Ans- I usually ask my emplyoees to be punctual in their tasks. 7. The Prince noticed there long faces.He blazed with anger. (Make it a Simple sentence) Ans- Noticing their long faces The Prince blazed with anger. 8. He knocked at the gate and demanded admission. ( Make it a Si...