Protecting the earth is not ____ to be left to the government．Everybody should be concerned．

 Few pleasures can equal ________ of a cool drink on a hot day.  

  The new technology will make ________possible to grow food with very little water.

I don’t like to travel to big cities, because to me, one city is much like        .

— May I have some more tea with sugar，please?—I'm sorry，but there doesn't seem to be________.