The author uses the case of a single mother to demonstrate ______

(67)

(65)

(64)

(66)

Mine. Loisel now knew the horrible experience of the impoverished. [(63)She. carried her burden. however. with heroism.]That dreadful debt had to be paid, and she would pay it. The Loisels fired their servant. [(64)They moved from their comfortable apartment to a small attic-like flat under the roof.]

[(65)She came to know what heavy housework meant and she came to know the hateful chores of the kitchen.] She washed the dishes, breaking her beautiful nails on the greasy pots and pans. She washed the dirty linen, the shirts, and the dishcloths, which she dried on a line. [(66)She carried the garbage down to the street every morning and carried up the water, stopping at every landing to catch her breath. ]And, dressed like a poor woman of the streets, she went to the grocer, the butcher, and the fruit vender, carrying her basket on her arm, bargaining, shouting, and defending every sou which she had to spend on food.

[(67)Each month they had to pay of some old debts. renew others and make some new ones.]

Her husband worked in the evening as a bookkeeper, and late at night he copied manuscripts for people at five sou a page.

This life lasted for ten years.

At the end of ten years they had paid everything, the principal on their many loans and the terrible high interest, too.

(From The Necklace)

（63）

What is the proof that showed modem societies have responded effectively to critical situations?

(59)

(60)

What does the author mean by saying trend is not destiny" in the 3rd" paragraph?

(56)