根据句意及汉语提示完成单词①It was a great e{#blank#}1{#/blank#} to be a volunteer of the 2012 Olympic Games.
②We all know that Zheng Chenggong was a great national h{#blank#}2{#/blank#} in Chinese history.
③ I don't like it when shop assistants f{#blank#}3{#/blank#} me around while shopping.
④Some of the animals are in d{#blank#}4{#/blank#} of dying out. We must protect the environment.
⑤Nowadays computers have a great i{#blank#}5{#/blank#} on people's life.
