选择正确的答案，并将其字母符号填在句子前面的括号里。
The Black familly
Mr and Mrs Black have two sons (儿子) and three daughters . They also have a cat . They have a big house . Their house has a kitchen , five bedrooms , two bathrooms and two otherooms . The Black family have some trees near their house . They have two cars . On Saturday and Sunday they go to the seaside (海边) in their cars . Mr and Mrs Black work five days a week . They are teachers . They help their students . They also help their sons and
daughters .
（1）Mr and Mrs Black have       children .
A. seven            B . six            C . five
（2）There are         rooms in the house .
A. five              B . seven         C . ten
（3）They often go out by         .
A. bike              B . bus          C . car
（4）Mr and Mrs Black don’t work on         .
A. Saturday           B . Sunday      C . Saturday and Sunday
（5）Their children may         .
A. be students at school
B. work in a school
C. help their mother at home