问题
选择题
This is ___that they all want to but it.
A．a so useful book
B．such an useful book
C．a such useful book
D．so useful a book
答案
答案：D
such a/an +形容词+名词="so" +形容词+a/an +名词。
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This is ___that they all want to but it.
A．a so useful book
B．such an useful book
C．a such useful book
D．so useful a book
答案：D
such a/an +形容词+名词="so" +形容词+a/an +名词。