Part-3 (e) A sometimes means the same: • All of a size (- all of the same size) • Birds of a feather (- birds of the same kind) • Four at a time (- four together) • Two of a trade ( two persons of the same profession or trade) • The shirts are all of a size. • Birds of a feather flock together. • Please enter one at a time. • Two of a trade seldom agree. (f) In some phrases expressing number or quantity a is used like a dozen, a score, a hundred, a hundred thousand, a lot of, a great deal of. • He purchased a dozen bananas. • There were no more than a score of people at the meeting. • There are about a hundred trees in the garden. • The students made a lot of noise in the class. • You need a great deal of money to buy this house. (g) In exclamations: • What a pity! • What a surprise! • What a cold day! • What an ugly sight! (h) Before names of persons to indicate unfamiliarity. There is a Mr. Jones at the door. Does any one here know him? (the spe...