英语句子中的问题 韩国综艺情书下载 货币供应

Plutarch s Lives there was, in which I read abundantly, and I still think that time spent to great advantage.

老师这句话中的Plutarch s Lives there was不应当用完整倒装吗?in which I read abundantly为什么用in which? to great advantage是什么用法?