is this an apple an orange__an egg

is this an apple an orange__an egg Is this an egg? This is an apple就an apple部分转换提问 this is an apple.改成复数形式 an,is,apple,this连词成句 This is an apple 变为复数句子 here _____ an apple and an egg. 答案是is 还是are,为什么? he has an egg and an apple for breakfast 对 an egg and an app This is an egg (改为复数形式） I _____ an egg for breakfast this morning and i ___an apple a kite an egg an orange a banana an apple an apple 的意思是什么? 请问为什么苹果和鸡蛋要用,an apple、an egg 而不是a apple、a egg