Did you hear the news about the fire in our building- Yes. It took the firemen two hours to_______ the fire.

I don’t know ________ in the new school.

Do you know the reason _________ pilots turn off the plane’s lights before taking off? —The practice is for the passengers to adjust to the dark _________ an emergency.

We should ____ for possibledelays on the motorway and leave an hour earlier. [ ]

Lucy, can I borrow your bike— I didn’t hear clearly.