The arehitects who designed the London Eye (i) _______ drew it for a competition in 1993. Subsequently, they formed a (ii) _______ with British Airways to develop the project. As the biggest observation wheel ever built, its construction involved 1,700 people in five countries. Most of its (iii) _______had to be invented, and delivering them had to be coordinated with the tides in the River Thames. On average, 350 hours a week are spent (iv) _______ the maintenance of the Eye, and only distilled water is used to (v) _______ the glass.

(ii)_______

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