crowded/usually/streets and a/ artist/pavement/it's/difficult/pictures/to draw.
The city streets are usually crowded and it's difficult for a pavement artist to draw pictures.
a lot of/There is/in the city center/rubbish so /all day long/works/the cleaner.
There is a lot of rubbish in the city center so the cleaner works all day long.
city/Our/ huge/a/has/area/pedestrian where we /see/ can/ sellers/ souvenier/ with/stalls/their.
Our city has a huge pedestrian area where we can see many souvenier sellers with their stalls.