In Expressions^x, Countable nouns^x

Hello, English exhilaration This is how I'de rewrite your sentences, but I don't see anything wrong with most of the verbs in square brackets. The "mistakes" seem to be somewhere else in the sentences. 1. Ranjit may help himself to the beer in the fridge. "To" instead of "with". "To help...

Expressions such as: - a number of - a large/small number of - the number of - large/small numbers of are followed by a noun in the plural ("a number of" can refer only to countable nouns). "Large numbers of/A large number of teachers attended the seminar." "This killing brings the number of...

You can't omit the first "the" (or "a") in front of "unit" since "unit" is a countable noun in singular form. The same goes for "dollar". There is no reason (at least none that I can discover) for or against a "the" before "currency". However, the common expression is "the unit of...