, NAM AND HIS SONS HELP HIM ON THE FARM

13. - ENGLISH 9 BAI TAP TRAC NGHIEM NANG CAO
ENGLISH 9 BAI TAP TRAC NGHIEM NANG CAO

13. On weekends, if Mr. Brown is ..., Nam and his sons help him on the farm.

a. busy b. free c. available d. occupying