高等继续教育 / 高级英语II
正确率：100%
题型描述: 单选题
Advertising first became important in the last 15th century, ＿＿＿＿＿＿＿＿ the merchants of the rapidly growing cities and towns needed a way to tell people ＿＿＿＿＿＿ their goods could be bought.
A.when, how
B.then, where
C.then, how
D.when, where
Advertising first became important in the last 15th century, ＿＿＿＿＿＿＿＿ the merchants of the rapidly growing cities and towns needed a way to tell people ＿＿＿＿＿＿ their goods could be bought.
A.when, how
B.then, where
C.then, how
D.when, where
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