1 I have never painted a mural over graffic before 

2 Mr Binh has recycled rubbish for 2 year

3 Because David the exam because of his laziness 

4 It's five months since they last cleaned up the street

5 We began to donate /doneting books and clothes 10 years ago

6 Organisation

Hc tốt

1. This is the first time i've ever painted a mural over graffic

-> I have never painted a mural over graffic before

2.Mr . Binh started recycling rubbish 2 years ago

-> Mr Binh has recycle rubbish for 2 years ago

3.David failed the exam because of his laziness

-> Because David was lazy, he failed the exam

4.They haven't cleaned up the street for 5 months

-> It's 5 months since they last cleaned up the street

5.We have donate books and clothes for 10 years

-> we began  to donate books and clothes 10 years ago

6. Go green is a non-profit organisation that protects the environment ( organise)