请根据括号中的中文提示、英文释义或句意，写出句中所缺单词，使句子通顺。Alex is crazy about computer. He wants to be a computer {#blank#}1{#/blank#} （工程师）in the future.
Being tall gives him an{#blank#}2{#/blank#} （优势）over the other basketball players.
The young detective decided to{#blank#}3{#/blank#} （find out）the truth alone.
My father is not in.He has gone{#blank#}4{#/blank#} （away from one's own country）on business.
{#blank#}5{#/blank#} people can't hear，so they always use their hands to communicate.
