Sugar cane cultivation(甘蔗种植) originated in southwest Asia, where Marco Polo reported in his     1     (know) journals that the Chinese used dark brown sugar freely without additional refining(提炼). Sugar can cultivation spread from southwest Asia     2     the Middle East and the Mediterranean trade circle in the twelfth and thirteenth     3     (century).

In the fourteenth century, the island of Cyprus was the location of major sugar farms,     4     (use) Syrian and Arab slaves as labor. Sugar cane cultivation was made a science in the fifteenth century in Sicily, with the     5     (invent) of the roller mill to speed up     6     process. In those times, brown sugar was a byproduct of sugar refining, and wasn't used widely in cooking     7     the people in the sixteenth century found its real value.

Brown sugar     8     (come) into popular use with the rise of European sugar plantations in the Caribbean in the 1700s. It was widely used as a sweetener in English and     9     (it) colonies(殖民地) because it was much     10     (cheap) than white sugar. The use and export of brown sugar from islands rose with the trade.