Supply the correct form of the words in brackets to complete the sentences: Michael Jackson is her favorite ... (sing)

I. Supply the correct form of the words in brackets to complete the sentences.
1. Michael Jackson is her favorite ...... (sing)
2. You will get good.......at this school (educate)
3. It is very........ to drive too fast in the street (danger)
4. We should turn off the lights when going out to save....... (electric)
5. if we....... the water, we will have no fresh water to use (pollution)
6. Please could you speak more.......? (slow)