—Why not take ____ umbrella with the sign “Made in China”? It's ____ useful one.—What ____ good advice.

题型：单选题题类：模拟题难易度：普通

—Why not take ____ umbrella with the sign “Made in China”? It's ____ useful one.
—What ____ good advice.

A、an; an; a B、an; a; \ C、a; an; a D、\; an; a

举一反三

— I want to be engineer.

—Yeah. You're right. He always drops ____ “o” when he writes the word “dangerous”.

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