MARY (A) TOOK A BATH (B) WHEN (C) SOMEONE KNOCKED (D) ON THE DOOR....

30. - BAI TAP TRAC NGHIEM TIENG ANH 12
BAI TAP TRAC NGHIEM TIENG ANH 12
30. Mary (A) took a bath (B) when (C) someone knocked (D) on the door. III. Choose the one option (A, B, C or D) corresponding to the best sentence