A mural over graffiti là gì

1.this is the first time I've ever painted a mural over graffiti.

I have never...........................

2. Mr.Binh started recycling rubbish tow years ago.

Mr.Binh has .........................

3.David failed the exam because of his laziness.

Because David........................

4.They haven't cleaned up the street forr five months.

It's................................

5.We have donated books and clothes for ten years.

We began..............................