【導(dǎo)讀】What'sthis?It'sabun.It'sahotdog.It'sanegg.What'sthis?這是什么?that?那是什么?What'sthis?What'sthat?It'sa/an...What'sthis?It'sabun.What'sthis?It'safrog.What'sthat?It'sabee.What'sthat?It'sanegg.