In fact fuels we burn and plant food we eat ______ their chemical energy in the form of heat.

(2013·新课标全国卷Ⅱ)I got to the office earlier that day, ________ the 7：30 train from Paddington.

The fridge is _____for one year. It means that the company that makes it promises to repair or replace it if it breaks within a year.

I called the airline to ______ my flight reservation a week before I left for Canada.

You have nothing to___ by refusing to listen to our advice.