in the 18th century和in 18th century有区别吗?

问题描述:

in the 18th century和in 18th century有区别吗?
一篇英语阅读里面第一句:when tea and coffee were first introduced to Europe in the 18th century,第一个问题是tea and coffee were first introduced to Europe in______A______
A 19th century
B 18th century
C in 1801
D 1921
只有in the 18th century=in 19th century时才能选择A啊
难道in the 18th century和in 19th century指的都是1801~1900?
那in 18th century指的就是1701~1800?

要加the把.
特指十八世纪、
但是两个都有见过
我觉得答案肯定有问题.
十八世纪不可能跟十九世纪一样
应该选B那这题就这么简单?高中同学问我的呢,太简单了。。。应该是,高中阅读很简单啊,可以找到原句的