Read the text below. Choose from A-H the one which best fits each space
1-6. There are two choices you do not need to.
Introduced in the thirteenth century, eyeglasses are now indispensable accessories to about one out of every two people on the planet. But how did people (1)____ read before the invention of glasses?

Rich Romans had educated slaves read to them, (2)______ - enormous magnifying glasses they moved over the parchment they were reading.

A Franciscan monk named Roger Bacon devised the first eyeglasses, (3)_____ held together by a single nail. These early glasses could only help people who had difficulty seeing close objects. It wasn't until the sixteenth century (4)________.

Since then, optical techniques have improved (5)________. In fact, the introduction of contact lenses and, more recently, laser operations to improve eyesight leads one to wonder (6)________. However, we'll always have sunglasses, the essential accessories of movie stars.

A which consisted of lenses with wood frames

B with the invention of lenses in the twentieth century

C if eyeglasses won't soon be sent to museums

D that opticians won't stop using durable plastic

E who didn't have good eyesight

F with doctors prescribing eye drops to the poor

G that opticians were able to correct shortsightedness

H while medieval monks used "reading stones"