问题
选择题
_______ jeans were invented over 100 years ago, they're still in fashion today.
A．Because
B．If
C．Although
D．Since
答案
答案：C
题目分析：句意：尽管牛仔裤在100多年前就被发明了，现在他们仍然很流行。A. Because 因为； B. If 如果； C. Although 尽管； D. Since自从。结合句意，牛仔裤被发明了100多年，现在仍然流行。可知前后表示让步关系，故用连词although，故选C。