词汇（共5小题；每小题1分;计5分）
根据首字母或汉语提示，完成下列单词的拼写，使句意明确，语言通顺。
To make the villagers’ lives easier, our government will build a b________ over the river.
There are 5 people waiting for Nucleic Acid Testing（核酸检测）in front of me. I am the s________ one.
After he thought twice, he d________ to become a teacher in a poor village after college.
Don’t eat junk food. It’s h________ to your health.
We must pay much attention to our s________, so don’t go swimming alone in the river.