xcdamon 发表于 2016-5-15 07:10
Just for information
首先我能确定是的 因为分号后面有一个before that time---> 由前面的did可知, 这里 ...
cadylql 发表于 2016-5-15 10:55
d如果改成:
the main source of revenue for the federal government was tariffs
alzn2765 发表于 2016-5-15 16:06
B和D根本就是两个完全不同的逻辑意思:
the federal government had depended on tariffs as its main sour ...
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