听录音，根据所听内容完成对话或语段，每空一词。
（1）A：Look，there are a _________ of_________ here.
B：Yes．What_________ ________ sign mean?
A：It means“_________”．
B：Can_________ go and_________ it?
A：No，you must _________ _________ from it．
（2）There are ________ signs in the_________．They_________ different things. We can’t ________ ________ the grass．We shouldn’t _________ in the river. And we ________ give the food_________ the animals.