-Is Tom still smoking? -No. By next Saturday he ____ for a whol

-Is Tom still smoking? -No. By next Saturday he ____ for a whole month without smoking a single cigarette.
A、will be
B、will have gone
C、will have been
D、has been going
【正确答案】：B
【题目解析】：【考点点击】本题考查将来完成体。【要点透析】将来完成时常与by+将来某一时间点连用,用 will have done表示,指动作截止到将来某一时间点会完成。