两道英语题,不明白为什么这样填?!
1.Thereis__an___"r"and___a___"d"intheword"door"2.Jackhas__a___usefulbook.__The___book...
1.There is __an___"r"and___a___"d" in the word "door"
2.Jack has __a___useful book.__The___book is also very interesting.
不明白! "r"又不是元音字母.为什么用"an"? "useful book"的"u"是原因字母,可是为什么么用"a"?
谁能解开我的疑问啊?谢谢了~ 展开
2.Jack has __a___useful book.__The___book is also very interesting.
不明白! "r"又不是元音字母.为什么用"an"? "useful book"的"u"是原因字母,可是为什么么用"a"?
谁能解开我的疑问啊?谢谢了~ 展开
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