How can we reduce CO2 in our home? —It’s easy．______off your TV or computers when you’re not using them, and you’ll greatly reduce it

Look! That building is on fire. Maybe some people are in danger.—Don’t worry. Some firemen are trying their best to save them and_______ the fire.

Somebody has left the lab door open.—Don’t look at me.

What the boy enjoys _____ to have a room of his own

Bad habits are no way easy to be ______; it needs yourdetermination and perseverance