ОЧЕЕНЬ НУЖНО,НУЖНО ПОСТАВИТЬ ГЛАГОЛ В НУЖНОЕ ВРЕМЯ I. Technological developments (to influence (certain plumbing projects. IPeople in Roman Empire (to repair) pipes and valves. ? he entire history of plumbing (to be) way too long. 4. Plastic materials (to replace) metal ones long ago. 5. Plastic for plumbing service (to grow) nowadavs. 6 the central heating system (not to appear) until the I" century В С. 7And of course with computers (to come) the digital revolution.8 Wax (can be used not) in producing pipes and tubes.9 Good maintenance (to influence) certain condition of the plumbing system. 10 The culture of England (to develop not) healing.

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