Etiket - ingilizce kurs fiyatları ankara

GENEL İNGİLİZCE SORULARI 162

  Until humans (1) ---- a way to breathe underwater each dive was necessarily short and frantic. In the 16th century people began to use probably the first (2) ---- means of staying under water. In England and France, full diving suits made of leather were used to depths of 60 feet. Air (3) ---- down from the surface with the aid of manual pumps. Soon helmets were made of metal to (4) ---- even greater water pressure and divers [...]

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