НМТ часи пізанська вежа

The Leaning Tower of Pisa Has Never Been Straight

Soon after building started in 1173, the foundation of the Pisa tower settled unevenly. Construction ______ (1), and was continued only a 100 year later.

Since regular measuring of the tower began in 1911, the top of the tower ______ (2) 1,2 millimeters per year.

In 1989, the Tower of Pisa Project Consortium commissioned engineers ______ (3) the Leaning Tower.

Engineers are working on the footing of the Tower rather than the structure, ______ (4) to ease the top back about 20 cm.

But it means that the tower ______ (5) leaning.