I told Sally how to get here, but perhaps I for her.
A. had to write it out
B. must have written it out
C. should have written it out
D. ought to write it out
网友回答
A. had to write it out
B. must have written it out
(答案→)C. should have written it out
D. ought to write it out
解析：考查情态动词。根据told可知这里谈论的是过去的事了。横线处的意思应该是：也许当初我应该给她写出来。这样的话，选C. should have done表示：本来应该做某事，而实际上没有做。 must have done表示：过去肯定过去某事。故C正确。