You’re writing an essay now , right? —Yes. I’m busy collecting material ____ to the topic .

He said that very clearly so that nobodywas in ____ about what he meant

Boris has brains. In fact, I doubt whether anyone in the class has ____ IQ.

My father is handsome and________,but sometimes he is not________me.[ ]

What have you done these days?— I’ve read all the books _____ you gave me because they are the best ones _____ are on the subject.