根据短文内容和首字母提示，在下文空格处填入适当的词使短文完整，在答题卡标有题号的横线上，完整地写出空缺处各单词的正确形式。（每空一词）
A man tried to catch monkeys to sell them to zoos. The monkeys, however, were very c      and every kind of trap(计谋) that he set failed.
A young boy watched the man’s efforts and then took a pot with a narrow(狭窄的) neck. He placed a few peanuts around the pot and put lots of peanuts i       it. He then tied the pot to a tree and he told the man, “We should have a m        in a few hours.”
Some monkeys soon discovered the peanuts and the pot. One put his hand into the pot e   and got a handful of peanuts, but he couldn’t p     his hand with peanuts out of the narrow opening of the pot. The monkey was a     and began to cry. Some of the other monkeys tried unsuccessfully to pull the pot off his hand.
The boy and the man heard the noise. As the boy came near to the monkeys with a bag, the monkeys all ran away e    the one with its hand in the pot. The boy packed the monkey and the pot into the bag. The man was s     and asked the boy the secret of his monkey trap. “Why was it so easy for the monkey to get his hand in but so h    to get it out?”
The boy laughed and said, “The monkey could get his hand back out if he let go of the peanuts in the pot, but he just wasn’t w    to let go. They never are.