the number of people invited___fifty,but a number of them__a

the number of people invited___fifty,but a number of them__a The number of people invited()eighty,but a number of them()a The number of people invited was fifty,but a number of them The number of people invited ( ) fifty,but a number of them The number of people invited （ ） fifty,but a number or them the number of,a small number of,a number of. a number of the number of the number of与a number of we interviewed a number of people for the job but ＿of them i the number of、a number of、large number的区别 the number of,a small number of,a number of.,a great number there the small number of people there()a small number of pe