Usually, we don’t know how important something is we lose it.

_____ are the apples —Ten yuan a kilo. ______ would you like

More and more cancer patients _________ in hospital owing to polluted environment and people’s bad lifestyles.

arequiet, aren’t they—Yes They are accustomed ______ at meals

– What about playing with the boysthere in the water while learning swimming — In my opinion, ________.