成语典故：以羊易牛
One day, King Hui of Liang saw a man leading an ox pass by. He asked, “Where are you taking the ox?”
The man stopped and said, “I’m taking it to be killed and use its blood to paint the bell.”
King Hui felt sorry for the ox and said, “How can you do that? It’s too cruel. Let it go right away. It hasn’t done anything wrong. How can you kill it? I don’t want to see it scared, crying, and shaking before its death.”
The man asked, “So, you mean I should let the ox go and not paint the bell?”
King Hui replied, “What are you saying? You still need to paint the bell! Let the ox go, but use a sheep instead.”
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1.1. What did King Hui see one day?
A A man leading a sheep.
B A man leading an ox.
C A man painting a bell.
D A man crying and shaking.
解析：选B。细节理解题。根据第一段中的“King Hui of Liang saw a man leading an ox pass by”可知，梁惠王看到有一个人牵着一头牛走过。故选B。
2.2. What did the man plan to do?
A Paint the bell.
B Feed the ox.
C Sell the ox.
D Eat out.
解析：选A。细节理解题。根据第二段中的“I’m taking it to be killed and use its blood to paint the bell.”可知，牵牛的人要把这头牛杀掉，用它的血来涂钟。故选A。
3.3. What does the underlined word “cruel” mean?
A 危险的.
B 客气的.
C 感人的.
D 残忍的.
解析：选D。词义猜测题。根据划线单词后面的“It hasn’t done anything wrong. How can you kill it? I don’t want to see it scared, crying, and shaking before its death.”可知，梁惠王对牛十分怜悯，说：“那怎么行呢！赶快把牛放掉。它没有罪，怎么能把它杀掉呢？我不忍心看到牛临死前惊恐、流泪、战栗的样子。”因此他认为这样做太残忍了。故选D。
4.4. Why did King Hui ask the man to let the ox go?
A Because he didn’t like the man.
B Because the ox looked sick.
C Because he felt sorry for the ox.
D Because the ox was too old to kill.
解析：选C。细节理解题。根据第三段中的“King Hui felt sorry for the ox”“It hasn’t done anything wrong.”和“I don’t want to see it scared, crying, and shaking before its death.”可知，梁惠王对牛十分怜悯，因此他要求放走牛是因为他为牛感到难过。故选C。
5.5. Did the man finish his work?
A No, he didn’t.
B Yes, he did.
C No, he wasn’t.
D Yes, he was.
解析：选B。推理判断题。根据最后一段中的“You still need to paint the bell! Let the ox go, but use a sheep instead.”可知，梁惠王要求他把牛放了，换只羊来杀，用羊的血涂钟，因此他完成了涂钟的工作。故选B。