阅读Sam上周活的短文，根据短文内容选择正确答案。

   On Monday, Sam played football. On Tuesday, Sam listened to music. OnWednesday, he watched TV. On Thursday, he helped his mother with the housework. On Friday, he washed his clothes. On Saturday,

he did his homework. On Sunday, he played the guitar.

1. On Saturday, Sam            .

A. talked to his friends            

B. did his homework

2. On Monday, Sam _          .

A. played football                

B. played basketball

3. On Friday, Sam             .     

A. read a book                  

B. washed his clothes

4. On Sunday, Sam _          .

A. played the guitar              

B. played on the computer

5. On Wednesday, Sam             .

A. listened to music              

B. watched TV

说出诊断佝偻病激期有哪些重要依据？