_______example of ________animal without______backbone is the earthworm.请问,这里三空填什么冠词?答案是（An,an,a）,为什么?特别是第二空为什么要用an?

_______example of ________animal without______backbone is the earthworm.请问,这里三空填什么冠词?答案是（An,an,a）,为什么?特别是第二空为什么要用an? We __ __ __ __ __ the news :high levels of air pollution,__ __ __ not suitable for swimming.. Would you like a piece of pizza?不变__ __ __ __ a piece of piaaz? 英语翻译接上：we __ kind of __ of him. There is a bowl of rice in the fridge. a 提问 __ __ __ __ __ __ in the fridge? There is a bowl of rice in the fridge.a 提问 __ __ __ __ __ __ in the fridge __?__ __?__ some noodle?What kind of noodles do you have?, Both of his parents are busy with their work.(同义句)__ __ __ __busy __. i used to be afraid of speaking in __ __ __ __ ___ （当众） __ __ __Shanghai ,they ate a lot of delicious food. 看图,写出短语中所缺的单词.1.a __ of ___ (鱼)2.two __ of __ (面包)3.two __ of __ (牛奶) 英语翻译__ three __ of the world's newspapers__ __ English?有4空哦． 英语翻译There __ a small restaurant at __ __ of the street she takes care of her sister.同义句her sister __ __ ___ __by __ This pair of shoes is __ __ __that pair __ size. How much are the beans?(改为同义句)__ __ __ of the beans? 我们班每个同学都对我很友好.Everyone of my classmates__ __ __ __. here is one of my family photos同义句 here is __ __ __ my family