题目内容：

The house will be very cold.Make sure ——the heater.
A.you will light B.you light C.for lighting D.lighting

优质解答

The house 【will be将来时时态信息】 very cold.Make sure ——the heater.
A.you will light B.you light C.for lighting D.lighting
选B.
这里考查 make sure (that) sb do /have done sth 确保要做某事/已经做某事【多用一般现在时或现在完成时.】
句意：房子里会很冷.务必打开加热器.