Q99. Updated reading and writing fill in the blanks

Reading and Writing fill in the blanks practice exercise. Below is text with blanks. Choose the correct word for each blank to complete the text. 

The wondrously intricate tile mosaics that adorn medieval Islamic architecture may cloak a mastery of geometry not matched in the West for hundreds of years. For a long time, historians (1…………….) that sheer hard work with the equivalent of a ruler and compass allowed medieval craftsmen to create the ornate star-and-polygon tile patterns that cover mosques, shrines and other buildings that stretch from Turkey through Iran and India. Now a Harvard University researcher (2…………..) that more than 500 years ago, math whizzes met up with the artists and began creating far more complex tile patterns that culminated in what mathematicians today call “quasi-crystalline designs.” Quasi-crystal patterns weren’t demonstrated in the West until the 1970s.

Quasi-crystals (3…………) by fitting together a set of shapes, including five- and 10-sided shapes, into patterns that, unlike typical tile floors, don’t repeat. In Friday’s edition of the journal Science, Lu and Princeton physicist Paul Steinhardt report finding a set of polygon-shaped tiles— a decagon, pentagon, diamond, bowtie and hexagon— that (4…………) distinctive patterns found on major Islamic buildings from the 12th through 15th centuries.

1. Assume, have long assumed, will have seen assuming, would assume
2. Argues, is argued, has been arguing, would argue
3. are made, are making, make, were made
4. are arranging into, has arranged into, have been arranged into, were arranged into 

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