1.   All over the city are huge building sites where the sun pours into vast craters.

2.   Back alleys and building sites, a concrete subway dripping cold, paving stones lurching in sand and black water.

3.   But employment in the building trade is notoriously irregular, and such artisans alternate self-employment with wage-paid work on the building sites.

4.   Empty building sites have been reclaimed and replanted.

5.   He had, meantime, managed to get himself a job on a building site.

6.   He has worked on various building sites.

7.   He works as a helper on building sites, casual, low-paid labour.