_________(IT'S AN ERASER/IT'S A ERASER/ IT'S ERASER/IT'S AN ERASERS)

71. - 500 CAU TRAC NGHIEM TIENG ANH 6 7
500 CAU TRAC NGHIEM TIENG ANH 6 7

71. What's this?_________(It's an eraser/It's a eraser/ It's eraser/It's an erasers).