BEFORE YOU ASKED, THE LETTER……….A- WAS WRITTEN B-HAD BEEN WRITTEN C...

27- - BAI TAP TRAC NGHIEM VE THI TRONG TIENG ANH
BAI TAP TRAC NGHIEM VE THI TRONG TIENG ANH
27-Before you asked, the letter……….A- was written B-had been written C-had written D-has been written