(单选题)

—My grandma got lost in the street and she went back in a police car.
—______ policeman she met!

A.How helpful

B.What helpful

C.What a helpful

D.How a helpful

参考答案：C

参考解析：

考查感叹句。句意：“我的祖母在大街上迷路了，是警察送她回来的。”“她遇到了一个多么乐于助人的警察啊！”此句为修饰单数名词policeman的感叹句，用what +a+形容词+名词；How在感叹句中修饰形容词或副词，结构为how+形容词/副词+主语+谓语。故选C。

知识点：

—My grandma got lost in the street and she went back in a police car.—______ policeman she met!