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[kanzy1]

7- Scientists are always trying to find ---------- for diseases.
a) a cure b) an antiseptic c) an infection d) an antidote

9- The famous surgeon has.................... many successful operations
a) composed b) carried c) done d) made

Job .............. isn't an easy task .
a) founding b) hunting c) searching d) looking

The wind ...........…sail ships and boats for centuries.
a) was used b) is used c) has used d) used to

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