13．16．Dave is略．
A．a(chǎn) doctor
B．a(chǎn) student
C．a(chǎn) teacher
17．The children in Dave's class are略．
A．playing football
B．talking to the teacher
C．learning something about animals
18．Dave's house is略．
A．near the school
B．next to the zoo
C．a(chǎn)cross from the library
19．Dave's father is略．
A．a(chǎn) worker
B． a writer
C．a(chǎn) policeman
20．略often talks about animals．
A．Dave's father
B．Dave's teacher
C．Dave's classmates．
