听录音，排序。
{#blank#}1{#/blank#}I'm going to send an email to Mum.
{#blank#}2{#/blank#}There's a Chinatown in New York.
{#blank#}3{#/blank#}There were Chinese people everywhere.
{#blank#}4{#/blank#}I went to a library yesterday.
{#blank#}5{#/blank#}It was exciting!
