Congress, family, group, committee, class, organization, team, army, club, crowd, government, jury, majority(sing/plu ….majority believes that….., majority of doctors attend infirmary …), minority, public+ singular verb.
Flock of birds, herd of cattle, pack of dogs, school of fish, pride of lions+ singular verb.
Twenty-five dollars, fifty minutes, two miles etc collective nouns of time/money/measurement+ singular verb.
A number of/the number of:
A number of students are going to the class picnic.
The number of days in a week is seven.
The number of students who have been questioned on this matter is quite small.
Always plural holding nouns:
Scissors, shorts,pants,jeans,tongs, trousers, eyeglasses, pliers, tweezers+ plural.
The pants are in the drawer.
A pair of pants is in the drawer