10．The Lost Dog
One very cold Saturday in January，I was told to take our dog out for a walk，but it was so cold that I didn't want to go outside．Instead，I just opened the door and let the dog out by himself．
However，another neighborhood dog quickly ran past our house，and our dog sped after to catch him．（56）E．Unfortunately，it was too late，and my dog was gone．I walked a few blocks，but I was unable to find him．
Sadly，I returned home．I told my mother what had happened and I said，"I thought he would be able to come back by himself．"
My mother was very angry．（57）B．The signs read，"Lost：A big black dog． Please call us right away．"and she printed our phone number on the bottom I posted the signs along the streets around．The whole time，I was very sad and worried about our dog．（58）A．I continued looking for our dog in the neighborhood，but I didn't see him anywhere．I called out his name，looking in all the backstreets．
I got more and more upset All I wanted was to stay warm，but now I was very cold-and so was my dog．
Finally，I gave up．（59）C"Our dog came back home by himself．So，you were right-he did come back-but you were wrong，too．You should have been more responsible this morning．"She said．
"Yes，I was wrong．"I said in shame．
（60）D．What seems easy at first may turn out to be difficult in the end．
A．I thought he must be very cold
B．She decided to make some sighs
C．When I returned，my mother smiled
D．I learned a very important lesson that day
E．I hurriedly put on my coat and rushed outside |
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