Is this ( ) eraser?A her an B an C a D /

Is this ( ) eraser?A her an B an C a D / This is an eraser That is a look!() eraser is on the desk,whose is it?A .A B.An C .The D Is this----------eraser A、he is B、he C、her D、she This is her an eraser.与This is her eraser. This is a book ( )and book is new A.an B.a C.the D./ ___ elephant is ___ useful animal.A.An;an B.An;a C.Thn;an D. an eraser 还是 a eraser is this ____ tape player?yes,it is a.a b.an c.the d./ 单项选择 What is this,plese?---It is UFO.A.a B.an C.the D\ This is a ( ) useful advice A a B an C the D 应选哪一个 1.Is this Lucy's eraser?No,it's not_____.A.she B.hers C.her