Supermarkets are necessary. People usually spend less time ____things they want, but they usually spend more on things that they don't need.
--I will be away from home for some time. Could you do me a favor and look after my baby?--Not at all. _______.
——I’m so happy that you could come to English land with us for the holidays. ——_________ . It’s the first time for me to be out of china.