THEY ____ TEA WHEN THE DOORBELL ____.A. HAVE/IS RINGING B. WERE HA...

17) - TÀI LIỆU BO DE TRAC NGHIEM ON THI VAO 10
TÀI LIỆU BO DE TRAC NGHIEM ON THI VAO 10
17) They ____ tea when the doorbell ____.A. have/is ringing B. were having/rang C. had had/ rang D. having/ringing