是a black animal 还是an?中间有一个不是原因音节开头的要怎么用定冠词?

是a black animal 还是an?中间有一个不是原因音节开头的要怎么用定冠词? an useful animal?还是a useful animal? an animal还是a animal说明为什么? an animal doctor还是a animal doctor animal是用a还是用an做单数 jacket is black..这个________jacket is black是填a,an,the,还是不填冠词 black eraser前加an 还是a A__ t is an animal是A __t is an animal 请问兽医的英文短语是a doctor for animals 还是a doctor of animals 还是an animal doctor ___ elephant is ___ useful animal.A.An;an B.An;a C.Thn;an D.A;an___ elephant is ___ useful animal.A.An;an B.An;a C.Thn;an D.A;an答案给的是B,为什么不能第一个空不能填The?还有到如何判断u开头的字母到底是an还是a? 是a small black bear 还是 a black small bear? 这是什么动物?it is an animal.it is black and write.it looks like a horse. What animal wears a pair of big black glasses?是谜语，希望得到谜底。 the shark is not______ we have imagined.sometimes it is kind of friendly to peopleA as a fierce animal thatB so fierce an animal thatCas a fierce animal asD so fierce an animal as我知道so that so as 的区别是as是否作成分.那么还是搞 是a T-shirt on black还是a T-shirt for black?是on还是for? 大熊猫是一种漂亮的、黑白相间的动物.Giant pandas are a beautiful ,black-and-white animal.Giant pandas are beautiful ,black-and-white animals.两种都对吗? 大熊猫是一种漂亮的、黑白相间的动物.Giant pandas are a beautiful ,black-and-white animal.Giant pandas are beautiful ,black-and-white animals.两种都对吗? a story between an animal and human