题目

完形填空; 阅读下面短文，掌握其大意，从每小题所给的A、B、C三个选项中选出最佳选项。 One day Eric was traveling on horseback. At noon, he tied his horse to a   1  . A few minutes later, Paul came along and tied his horse to the same tree.    “My horse is wild,” said Eric. “Please tie your horse to another tree,   2  my horse will kill yours.” “No way!” Paul said, “I shall tie my horse as I like!” He tied up his horse and had his   3  nearby. After a moment they heard a terrible noise. The two horses were  4  . They ran下列四个电路图中与实物图相对应的是（ ）A． B． C． D．