A、The shop promised to change another one B、The shop promised to repair it if you charge it C、The shop promised to repair it for

Some months ago my friend bought a new refrigerator, but became worried when it did net work properly.
    The food did not keep well, the milk went sour quickly and the inside of the refrigerator had an unusual smell. My friend tried to do many different things to solve the problems. She checked every comer inside the fridge and wiped the refrigerator out with a wet cloth, all without success. This refrigerator would not work properly.
    Finally, my friend decided she had had enough. She asked her son-in-law to find the paper with the shop guarantee on it. This guarantee said the shop promised to repair the refrigerator for free if it broke down in the first three months.
    The son-in-law first had a look at the refrigerator to see what the problem was. To the amusement of all those present and the embarrassment of your friend, he found that she had plugged her refrigerator into the electric power plug in the wall, but had forgotten to switch the power on.