There are schools specially built for children with low intelligence．

The English teacher asked two of us to present a five-minute dialogue in English．

If we don’t find a solution to the problem of waste disposal, we will live with mountain of waste in the near future．

Altogether more than 150 000 people lost their lives in the tsunami．

Some of the snacks contain chemicals that do harm to human bodies．

The famous scientist thinks of himself as an ordinary agricultural worker．

Most European countries are industrial countries．

The river has been polluted by the waste from that factory．

I must apologize to you for not replying your letter sooner．

Sam suddenly sees there is a piece of chewing gum stuck to a brake．