题目内容
20.听第7段材料,回答第8、9题.8.How many times should the man start cleaning his baby's teeth a day when the first tooth appears?
A.Once. B.Twice. C.Three times.
9.When should the man start using soft baby toothbrush and a bit of toothpaste that is fit for children?
A.At about 1 year to 18 months.
B.At about 13 to 18 months of age.
C.At about 14 to 18 months of age.
分析 略
解答 BA
点评 略
练习册系列答案
相关题目