根据短文内容,从短文后的选项中选出能填入空白处的最佳选项.选项中有两项为多余选项.
People generally use spices (香料) every day when preparing meals.Most of these spices are readily
available in local supermarkets.However, in the 15th and 16th centuries, spices were as valuable as gold or diamonds.Spices are small plants or parts of plants, such as ginger, pepper, vanilla, and cinnamon, which
are used to add flavor to our food.__1 __ Such a use for spices actually goes all the way back to Roman
times.The Romans used spices such as cumin and coriander to help preserve food.
The spices came to Europe from countries to the east, such as the islands in the East Indies, Sri Lanka, and India. __2__ Because of the long journeys involved, they were very expensive.
European sailors began to look for routes to these countries themselves in order to bring back the
spices by sea.In 1498, a Portuguese explorer named Vasco Da Gama reached an East Indies island called Calicut. __3__ In 1519, another Spanish explorer, Ferdinand Magellan, found a new trade route by sailing west across the Atlantic Ocean, around the southern tips of both South America and Africa, and back to
Europe.
__4__ Portugal was the leader until the end of the 16th century.Spain was in control during much of the next 100 years.Then, Holland took over.The Dutch controlled the East Indies, but, in 1780, England
defeated them in a famous war.__5__ They treated the people there badly and made them submit to the
British government.
India finally became independent from Britain in the 1940s.Today, it is still called "the land of spices"．
In fact, at present India produces 2.5 million tons of spices each year and produced more types of spices
than any other country.
A. For centuries, Arab traders had carried the spices over land and sold them to European countries.
B. For the next four centuries, Western countries raced each other for control of the spice trade in these
new countries, which they called the "New World"．
C. Though they might not be as valuable today as gold or diamonds, spices are still big business around
the globe.
D. Six years earlier, Spanish explorer Christopher Columbus had been looking for spices when he
discovered America.
E. The English then moved from the islands into India.
F. The history of spice is almost as old as human civilization.
G. In those times, spices also helped keep meat from spoiling.
铸造金属桥不良修复体，冠固位体完全不密合，修复体有松动，基牙可探及有龋坏。口内上颌
，下颌
天然牙存留，牙冠牙体形态尚正常，均叩（-），松（-），咬合空间正常。口腔卫生较差，部分天然牙体探及龈下牙石。拆除口内不良修复体后，发现口内
缺失，
牙冠缺损，牙体龋坏明显，均叩（-），松（-）；
残根，
松动Ⅰ度，
松动Ⅰ～Ⅱ度，根面腐质多；
残根于龈上约2mm，叩（-），松（-）；口内可见部分残根区牙龈充血明显，有较多牙结石。患者身体健康，无心脏病、高血压等病史。
的情况，如果建议患者进行根管治疗后保留，可以考虑的修复方案是（）