I don’t remember the book yesterday.

The workers are talking about the doctors and the offices ____ they visited yesterday.

It’s not enough an English club. You should also read English newspapers and magazines often.— Thanks for your advice.

You won’t discover the truth ______ youlook into the matter yourself.

This passage is difficult for meCould you please explain it to me?—I’m afraid I have to say sorry, but the book is ________ my understanding