1.   The glass has become a kind of substitute money.

2.   His glasses become important as they symbolise his wisdom and how he comprehends things.

3.   But by the time beach glass has become beach glass it is long past the cutting stage.

4.   Ever since glass became affordable, windows have been put into every part of the house, from cellar to the attic.

5.   Glasses have become props, disguises, status symbols.

6.   Indeed, glasses have become so de rigeur that even people who can see perfectly are wearing them.

7.   Step by step, glass became ever more fanciful and decorative as innovations enhanced the process.

8.   The palace workshops grew productive and glass became very fashionable, both inside the court and out.

9.   With Ms. Diller and Scofidio, glass becomes an instrument for creating illusion and provoking voyeurism.