问题
选择题
--Tom used to be afraid of snakes.
-- ________. I thought they were scary.
A．So did I
B．So do I
C．So was I
D．So I was
答案
答案：A
根据答语的内容I thought they were scary.，可知答案为A。在so 引导的倒装句中当so+助动词+主语（主语与上文的主语不一致），表示另一个人也是如此，表示故选A