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[مستر محمد صلاح]

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
السؤال الأخير خطأ لأن الجملة passive فلتكن الإجابة is used to