If we don’t pay much attention to the , the pollution will get worse and worse.

Do you know ________ woman in red over there –Yes. She is ________ office worker.

We had hardly arrived at the foot of the YuntaiMountain it began torain heavily .

With science and technology advancing, plentiful kinds of medicines are being developed to _____ us of our pain caused by diseaese.

I shall never forget those years ______ I worked in the factory with the workers, ______ has a great effect on my life.