b
程度副词so 放句首半倒装
有had i dound 这个选项也是可以的,但have不行是现在完成时对现在有影响都过去八辈子了,可以一般过去或过去完成时态
So difficult it to work out the problem that i dicided to ask Tom for advice.A I did find
So difficult it to work out the problem that i dicided to ask Tom for advice.A I did find
B din i find C i have found D have i found
B din i find C i have found D have i found
英语人气：431 ℃时间：2019-08-20 00:03:06
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