根据下列文章,请回答 31～35 题。
A Desert Between Paul and Clara
Paul had long promised to marry Clara．But at thirty-three he met and married Alice．Clara was driven mad．
Paul was taken to court．The judge ordered him to pay Clara$600 because of the broken promise．Paul had to borrow the money from a moneylender．He agreed to pay back$5 a month—or twenty years．His wages at the time were$1 6 a month．Paul and Alice were poor but not unhappy．They had little enough food，certainly, even before the children began to arrive．Each month Paul paid$5 to the moneylender．He worked hard，never taking a holiday．In time，there were seven mouths to feed．
Illness was always with them．It grew serious when the oldest child was eight．The years of hunger weakened the family, because each month Paul paid$5．The details of the sickness were ugly, but the’ result was this：after twelve years of family life，Paul was alone in the world．
He lived alone．except for memories．Work was not now a god for him：it was a painkillers．Each month he paid，and in time the twenty years ended．From that moment his wages were his own．
0ne day, it was a h0“daV——he went to the seaside．He sat down on a seat by the sea．A middle-aged woman came and sat down near him．They recognized each other at Once．
The woman said，“The$600 has been in the bank since the day it was paid to me．It is now$6，000，and l have kept it for you．Will you let me share it with you？”
“N0，”said Paul，gently．“Each thousand is a lost life in a desert between US．It can never bring any happiness．”
第 31 题 Paul was ordered to pay Clara$600 because

A. he had borrowed$600 from her．
B. he had broken his word to marry her．
C. he had promised to give her$600．
D. he had spent a lot of her money．