Bark up the Wrong Tree 找错目标，错怪了人，白费精力

by:听力课堂网 www.tingclass.net
M：As a matter of fact, here's an agent right here, Gracie Hart.
Beth is an undergrad at Vassar.
She is doing a paper on law enforcement.
I'm helping her get an inside look.
G：I bet she'll do the same for you.
B：You know, Gracie, I would love to get a woman's point of view.
M：Oh, no, no, no, Beth. You're barking up the wrong tree.
Right, Hart? Catch you later.