3．聽下面一段材料，回答第19至第21題．
19．How old is Jenny's daughter？
A．About one your old．
B．About half a year old．
C．About two years old．
20．Why is Jenny worried？
A．Her daughter has a cough．
B．Her daughter doesn't eat anything．
C．Her daughter has a fever．
21．How long did Jenny's daughter stay in hospital？
A．For only two days
B．For about four days
C．For five days．
