《Language in use》Save our world PPT课件2
《Language in use》Save our world PPT课件2第3页

Observe

Observe the following sentences carefully. They are all from this module.

1. Reuse means “use again”. 2. Though pollution is heavy now, I don’t think it’s hopeless. 3. If the rivers are polluted, farmers can’t use the water for their crops. 4. If everyone starts to do something, the world will be saved.