问题
选择题
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
答案
答案：C
题目分析：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。