HE SAID HE WAS BUSY ____________ON AN AGRICULTURE REPORT.A. WORK B...

28. - DE DAP AN HSG ANH 9 NAM 2011 HUE
Tiếng Anh DE DAP AN HSG ANH 9 NAM 2011 HUE

28. He said he was busy ____________on an agriculture report.

a. work

b. working

c. works

d. to work