IN AMERICCA, A G BELL WORKED WITH.... AT BOSTON UNIVERSITY A...

5. - KIEM TRA 1 TIET BAI 1 ANH 8
KIEM TRA 1 TIET BAI 1 ANH 8
5. In Americca, A G Bell worked with.... at Boston University A. deaf-mute B. deaf- mutes C. mute-deaf D. mutes-deaf