HE STARTED WORKING FOR MR TAM IN MAY.A. HE WAS WORKING FOR MR TAM...

25. - DE THI HOC KI 1 ANH 8 TRAC NGHIEM 100%
DE THI HOC KI 1 ANH 8 TRAC NGHIEM 100%
25. He started working for Mr Tam in May.A. He was working for Mr Tam for May. B. He will work for Mr Tam from May.C. He has worked for Mr Tam since May. D. He stopped to work for Mr Tam in May.