Scarcely was he in his teens---his father died. A.than B.as

2Hardly ...than versus hardly ...when:the conjunction than is best left to work with comparative adjectives and adverbs (lovelier than; more quickly than).Consider a construction such as Sheila had hardly recovered from the flu when she lost her beloved beagle:in speech,one might tend to use than as the complement to hardly,but in careful writing,since time is the point,the word to use is when.In a more formal context,however,the idea would be better conveyed:No sooner had Sheila recovered from the flu than she lost her beloved beagle.In this sentence,than does belong because it is the natural conjunction after the comparative adjective sooner.3 As synonyms,hardly,barely,and scarcely are almost indistinguishable.
高手来了
以一段牛津词典上的解释为开场白
hardly/scarely/barely ...when/than
用when 和than的区别在于.你想听吗?
好吧,than是比较性连词,前后相似才能比较.所以前后时态一致
when是个时间点,前面的部分早于when,所以用完成时.
本题只能选A,than
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再免费送你一段牛津双解大词典的例子：
scarcely was the work completed than it was abandoned.
作业刚一完成就被丢到一边了