The sentence I'm having problems with is " Since 1896 the Olympic Games (be held) ________ every four years with some exceptions." The answer key says it is "has been held". Why should it be the singular form "has" instead of "have" as "Games" are plural,aren't they? Please explain to me why it should be "has been" instead of "have been".
The Olympic Games can be thought of as a single event which happens to be labelled as ‘the Olympic Games’. Correspondingly, as an event is singular, then the specific form of the verb is also singular. However, in my view, either would be valid. It’s similar to whether the name of a sports team is deemed singular (such as in US) or plural (as in UK).