高中英语同义句转换

题目

高中英语同义句转换
More than ten years passed.Then someone else turned penicillin into the great drug of the 20th century
It was over a ＿ ＿ someone else turned penicillin into the great drug of the 20th century

答案

填decade before
考点：1,从属连词before的用法,it was +XXX时间+before+一般过去时,“XXX时间后,发生了某事”.2,10 years=a decade