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15. ____ the wallet, found in the street, be put into a pocket or turned over to the policeman? Should the extra change received at the store be forgotten or returned?

   A. Should            B. Must                C. Would            D. Need

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14. Mrs O'Neill asked ____ questions, and she didn't scold us either.

   A. no               B. certain               C. many                D. more

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13. However, it only appears in the imagination and will never be ____.

   A. realized           B. supported             C. understood         D. produced

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12. Someone had taken the ____ diamond and put a faulty one in its place.

   A. real              B. pure                 C. right             D. exact

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11. We will go there by the fast train which cost a little more than the bus journey but a little ____ than flying.

   A. more             B. fewer                   C. less              D. cheaper

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10. Usually it cannot (get out) because the outside of the earth is too thick and strong. But in some places the outside of the earth is ____ and weak.

   A. thin              B. thick                C. flat              D. water

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9. The inside of the earth is very, very ____. The rock has melted like ice.

   A. deep              B. cold                 C. hard             D. hot

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8. These floating things are very ____. It is hard to see them.

   A. big               B. fast                 C. small              D. dangerous

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7. Some parts of the water are very shallow. But in some places it is very, very ____.

A. deep              B. high                 C. cold             D. dangerous

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6. Many Africans are very ____ and so they can't afford to eat much meat with their cereal.

A. healthy            B. poor                 C. rich              D. weak

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