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。
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。