I WOULD NOT LET HIM GO, IF I ________ ALL ABOUT THIS TRIP.A) KNEW B...

19. - TÀI LIỆU ON THI TN 12 CO DAP AN
TÀI LIỆU ON THI TN 12 CO DAP AN

19.

I would not let him go, if I ________ all about this trip.

A) knew

B) know

C) have known

D) would know