I _________ you, but I was busy all the time yesterday afternoon.
It hasn’t been announced ______ the plane is to take off.
Students ______ to do some voluntary work every year.
You can smoke here ______ you leave a window open to let the smoke out.
It is usually cheaper to have the goods ______ by sea than by air.
The pianist ______ a love for music when he was a little boy.