Question

Legend tells us that in about three thousand years B C a Chinese Empress, (a) ___________ taking her tea, out of curiosity, dipped the cocoon of a silk worm (b) ___________ it and learnt to (c) ___________ the fine thread of silk of which it was composed. It was nearly five thousand years later (d) ___________ a French man, experimenting with crushed leaves of the mulberry tree, on which the silk worm feeds, found out how to produce a silk filament which we now call artificial silk. a

Answer 1

Answer:

a)while

b)when

c)as

d)on