试题题干
Fill in the blanks with the words given in brackets. Make changes or add something where necessary.
All people need three
(certain) to feel healthy and positive about life.
参考答案
试题解析
由空格前的three可知空格处应当填写名词复数形式certainties。句意：所有的人都需要三种确定的感觉，让他们自感健康并对生活抱积极的态度。