she said she ___ mr five letters in one month.

问题描述:

she said she ___ mr five letters in one month.
a) has written
b) will write
c) had written
d) wrote

C 因为in one month“在一个月中”~所以用完成时~
又因为是said~而write又是在said之前发生的~所以用过去完成时~