是a apple tree还是an apple tree?

是a apple tree还是an apple tree? 是a apple tree还啊an apple tree? 是an apples tree 还是an apple tree?是a sport meeting还是a sports meeting?为什么? 是an apples tree 还是an apple tree 是a sport meeting还是a sports meeting 为什么 是apples tree 还是apple tree There is ____apple tree in our school.这apple前应该用a,an还是the? 关于an apple a day,keeps the doctor away到底是an apple a day an apple one dayone apple a day还是one apple one day 一个苹果或一个梨是an apple and a pear 还是an apple and pear? （）1.What are these?A.An apple tree when an apple fruit grows on a mango tree Tony is reading under an apple tree.Tom is pointing ( )the tree.请问（ ）里填at 还是 to.填to 是为什么?填at 是为什么? half an apple 还是a half apple还是都可以 一个红色的苹果 是a red apple 还是 an red apple 并且说出为什么 一个大苹果是What a big apple还是What an big apple There are many apples_______the tree.A bird_______the tree is eating an apple.怎么填 draw an apple tree under the tree,drdw a cat colour the cat brown是什么意思 What a delicious apple还是What an delicious apple? ________(a还是an) amazing apple