MY SISTER SAID SHE …………..TO HER TEACHER AS A SIGNAL THAT SHE SAW H...

23. - KIEM TRA 1 TIET SO 1
KIEM TRA 1 TIET SO 1
23. My sister said she …………..to her teacher as a signal that she saw him.A. have waved B. has waved C. had waved D. is waving