7．
根据短文内容和所给中文提示，在空白处写出正确的单词，每空一词
Do you like eating raisins(葡萄干)? They are dried grapes that have been eaten (广泛地) for thousands of years. Nearly 3,500 years ago, the first raisins
were (发现) as grapes that
were drying in the sun on a vine(藤). In the past,
Europeans used raisins as medicine and even as a (形式) of money.
In America, raisins were seen after an 1873
(高温) wave in
California destroyed its valuable grapes, leaving only dried but tasty grapes.
Soon, some (农民) began developing
seedless(无籽的) grapes in California. These grapes would
be (烘干) in the sun and
became the popular dark raisins we eat and enjoy today. Later, there was a kind
of golden raisin. It was made by treating grapes with a chemical(化学物质) and using some special methods to (加工) them.
Today, central California (保留) the center of the world's raisin industry. It can (生产) nearly 35 percent of the world's raisins, (它的) sunny climate and hot temperatures provide the perfect conditions
for grapes that are dried into raisins.
