IT IS IMPERATIVE THAT THIS LETTER……….IMMEDIATELY. A WERE SENT B. S...

87. - 99 NHỮNG CẤU TRÚC THƯỜNG GẶP TRONG BÀI THI DAP AN
99 NHỮNG CẤU TRÚC THƯỜNG GẶP TRONG BÀI THI DAP AN
87. It is imperative that this letter……….immediately. A were sent B. sent C. was sent D. be sent