This is the most interesting book ______ I have ever read.

The book Jenny’s. There is her name on it.

Would you please help me get this job with the company?—Sure. You know, I would do ______ for you.

When I talked with my grandma on the phone,she sounded weak,but by the time we up,her voice had been full of life[ ]

If a man ______succeed, he must work as hard as he can.