Prior to lighting off a cold automatically fired auxiliary boiler, yon should _____.

Prior to reading an aneroid barometer，you should tap the face lightly with your finger to

Please turn the light off before leaving the room.（英译中)

When________ that it was getting late, I put off the light and went to bed.A、findB、fi

回答题。 Life at Home in the Year 2040Do you forget to turn off the lights and heaters wh

On cold days in Delhi, the poor light bonfires （篝火) of tyres, trees and rags whose fumes

Many of our men are off work with colds just now. We have been______with a skeleton staff.