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They started the car park in May

 The car park was started in May.

They brought five pile drills to the site.

 Five pile drills were brought to the site.

 They bring a lot of workmen to the site every day.

A lot of workmen are brought to the site every day.

They will finish the work in three years’ time.

 The work will be finished in three years' time.

 They say there will be space for 1000 cars.

It is said that there will be space for 1000 cars.

They have not laid the foundations yet.

The foundations have not been laid yet.

 They reached the water table in August and switched on the pumps.

The water- table was reached in August and the pumps were switched on.

They are causing a lot of problems for the local residents

A lot of problems are being caused for residents.