阅读下面短文, 掌握其大意, 然后从每题所给的A、B、C、D四个选项中选出最佳选项。There was once a young mouse that lived in a hole(洞)in a wall. He thought he was a smart and careful animal.
One day, the young mouse woke up(唤醒)from his sleep and looked out of the hole. As he looked out, a nice 1 came to him. " Cheese" the mouse said happily to himself, "I'll go and 2 it now and have it for breakfast."
But then he remembered his parents 3 . His parents were very wise mice and often said to 4 son, "Always wait before you go for a piece of cheese."
So the young mouse waited quietly. Then he heard a quiet " Miaow" and he knew the cat was there. So he stayed in the hole and said to himself, "I'm happy I 5 my parents` advice and learned to wait."
The next day, he 6 again. At the same time, he put his nose out of the hole slowly, and the same smell came again. This time he could see the cheese! It was only a few centimeters away, 7 be sat still and waited in his hole It's 8 that he did not hear any cat noises. Instead he heard a very quiet "Woof, woof ", a sound just like from a dog.
"Oh, it's a dog!" he thought, "If the dog is there, the cat won't be there. I expect the dog has chased(追赶)the cat away. So I am 9 ." The mouse ran out of the hole and started eating the cheese. He did not see the cat, which caught him and ate him later. When the cat finished her meal," she said to herself, "I'm glad I listened to my parents and leaned a second 10 . Sometimes, it can really make a difference."