【正文】
he boy is painting. She’s painting. The girl is painting. The boy and the girl are painting. They are painting. 15 swim He’s swimming. ing The boy is swimming. She’s swimming. The girl is swimming. The boy and the girl are swimming. m They are swimming. 16 run He’s running. ing The boy is running. She’s running. The girl is running. The boy and the girl are running. n They are running. 17 study He’s studying. ing The boy is studying. She’s studying. The girl is studying. The boy and the girl are studying. They are studying. 18 The girl The boy The boys