She _____ some of the food for her husband and went out.
A:leaved
B:left
C:leaving
D:leaves
老师说;“Good afternoon , class!”学生应该说__________________.
如图,△ABC与△CDA是全等三角形,则一定是一组对应边的是( )
下列关于疾病预防、治疗的表述中,错误的是( )