this is a girl and that\'s a

this is a girl and that\'s a This is a boy ,----that's a girl .空里是填and 还是but ,一定不能是but 么. There's a line between a thin girl and a sick one that is of this girl is my s ___ ,susan ls that a p____ ofyourfamily?ti This is a boy and a girl.为什么不说these are a boy and a girl. Who's that girl ___ my sister A This is B She is C It's D Th this hat is mine,and that -------is sam‘S A a B one c the This is a pen and that’s an eraser.可不可以写成This is a pen and t This is _______"M" and that's __________ "U".A.a,a B.an,an C 选择：Good morning and ( ) is Amy.a.this b.that c.that's This's a pen and that's a ruler. This is Peter's pen and that is ( )pencil,( )a red pencil.(h