WHEN THE CHILDREN _ HOME, IT WAS OBVIOUS THAT THEY HAD BEEN PLAYING...

8. - BAI TAP TRAC NGHIEM VE CAC THI TRONG TIENG ANH
BAI TAP TRAC NGHIEM VE CAC THI TRONG TIENG ANH

8. When the children _ home, it was obvious that they had been playing in mud.

A. Arrived B. were arriving C. had arrived D. had been arriving