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Put the words in brackets in the plurar. 1. (Business person) are involved in the management of (company) 2.My father builds(bridge) 3.Every year they spend a couple of (month) at the seaside 4.In our orchard we grow (potato) and (tomato) 5.This museum exhibits the 18th-century (organ),(piano) and (grand piano) 6.Why do financial (crisis) happen? 7.I want to read Shakespeare's (play), both (tragedy) and (comedy) 8.(Roof) on houses vary in geometry , method of ventilation and covering material 9.There are computer (disk) in those (box) 10. At the Geography lessons we study nature (phenomenon)