例句： Every day the chimneys of factories pour a large volume of smoke to the air to pollute it.

例句： The figure skater glided gracefully over the ice.

例句： Her secretary took care of all her appointments.

例句： American law has taken an intermediate position.

例句： Though they may not succeed, they will still try.

例句： I want no part in this sordid business.

例句： The teacher gave each of us a piece of filter paper before doing the experiment.

例句： The bread is baking in the oven.

例句： The fierce sun parched the bare earth.

例句： The whole town disagreed with the mayor.