Very intelligent child who plays dumb- is there a way to get passed this?

So today someone finally offered a helpful tip–

To borrow books on tape for my daughter. That way, if she starts in on the ‘I don’t know’ then I can still let her ‘read’ without me feeling that I am letting her get away with something. We have read that last couple of days, and she hasn’t done it yet. We read one book and I explain to here that I will read it to her, but she needs to ‘help’, we have done as suggested with taking turns, I let her read the pages that are fewer words, and words that she knows. That way if there is one or two words that she doesn’t know then I can help her sound them out. She is REALLY good at guessing words from the context. I still read to her ALOT, but at least this way if I am ‘unavailable’ to read, she can get most of the words on her own.