每当我一个人在家的时候,爸爸妈妈就会和我约定一个暗号。有人敲门时,只有答对了暗号,我才能开门。有一次,爸爸和妈妈出去办事。过了一会儿,对讲机的铃声响了,我拿起话筒问:“暗号是什么?”“小朋友,什么暗号呀?我找你爸爸有事。”“对不起,叔叔,我爸爸不在家,请您晚上来。”“那你开开门让我进去等他吧!”“请您打电话问我爸爸暗号,您说对了暗号我就开 Whenever I was home, Mom and Dad would agree with me on a sign. When someone knocks on the door, I can open the door only when I answer the sign. Once, my father and mother went out to do things. After a while, the ringing tone of the walkie talkie, I picked up the microphone Q: ”What is the sign? “ ”Children, what is the sign? I find your father something. “ ”Sorry, uncle, my father is not at home , Please come in the evening. “” Then you open the door let me in and wait for him! “” Please call my daddy sign, you said right