an banana对不对

an banana对不对 谁能帮我判断一下这三个英文句子语法对不对?1.Mike ate a banana,before eating an apple.2.Eating an apple,Mike then ate a banana.3.After eating an apple,Mike ate a banana. 是a banana 还是an banana banana banana前加a还是an banana前用a还是an YOU ARE AN BANANA何解? this is （ ）apple.those are（ ）.A.a,banana B.an ,banana C.an,banana D.a,bananas an amazing对不对 an apple and a banana可以写成an apple and banana吗? what's your favourite food?my favouritr food is____.A.banana B.an banana C.bananas This is a banana and that is an _____breakfast ,she eats an apple ,a banana and a hamburger. banana的单数是加a还是加an? Do you like ____?A.bananas B.banana C.an baDo you like ____?A.bananas B.banana C.an banana D.apple 脑筋急转弯：1,When an apple wanted to fight a banana,why did the banana run away? a banana and an apple 还是 a apple and banana.in schools and homes 还是 in schools and homes? 这句话对不对,是不是应该说成：apple and banana are kinds of fruits . fruits 到底该怎么用啊