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

解答 BA

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