—I had the computers repaired yesterday. —How much did they _________ for that? 

 This information allows businessmen to keep        of their list of goods by showing which items are being sold and how fast they are moving.

Three years ago，a society was set up to________the endangered animal and plant life from dying out in this area.

The green-hand cook        the soup by putting in too much salt accidentally．

My father began to learn English when he was in ___.