阅读理解。

     This is a picture of Mr Wang's family. The man in the middle is Mr Wang, the father. The woman is the

mother. They have two daughters. One is Wang Fang, she is twelve, the other is Wang Li. She is thirteen.

Wang Fang and Wang Li are in the same (相同的) school, but not in the same grade. Wang Fang is in Grade

One. Wang Li is in Grade Two. They are good students.

1. Mr and Mrs Wang have _______.

A. one boy and a girl

B. two boys

C. two girls

D. a girl

2. Wang Li is _______ sister.

A. Mr Wang's

B. Mrs Wang's

C. Wang Fang's

D. Mr and Mrs Wang's

3. Wang Fang is ________ and Wang Li is ______.

A. Twelve, eleven

B. twelve, thirteen

C. thirteen, twelve

D. thirteen, thirteen

4. Wang Li is ________.

A. Grade One

B. Grade Two

C. in Grade Two

D. in Grade One

5. How many people are there in Wang Fang's family?

A. one

B. three

C. four

D. five

关于HPV下列描述中，错误的是（）

A.直径50～55nm，具有72个病毒壳微粒及7900个碱基

B.为RNA病毒

C.主要感染上皮细胞

D.人是唯一宿主

E.多由HPV6，HPV11引起