--- Is Tom still smoking? --- No. By nex

问题选择题

--- 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

答案

Ｂ

“by+将来某一时间”常与将来完成时态连用。