1 Management is in a revealed in variety of specific activities......? а) doesn039;t

1 Management is in a revealed in variety of specific activities......? а) doesn't it? b) does it? с) isn't it?
2 A manager should know how to organize and coordinate employees.......? а) does he? b) shouldn't he? с) should he?
3 However the manager will rarely have all the knowledge he needs......? а)does he?
b) is he?
с) won't he?
4 Managers must be competent in every aspect of business.........? а) must they? b) do they?
с) mustn't they?