—Jim, is physics difficult to learn in high school? —Sure. No subject can be learned well ________ hard work.
Mr. Johnson drives ________________ than Mrs. Johnson.
— Who is the man over there? Is it Mr. Wu? — It ________ him, but I am not quite sure.
He looks tired. We’d better make him _______a rest in the room.
— do you walk your dog? —Less than three times a week.
None of them have pity on the poor. What shame it is!