... You should also be aware of when thisevent occurred; that is, something was heard before the lorry collided with traffic.Note that the signpost keyword (in this case "witnesses ") ... within sentences. Look at the following sentence:Britain has been a popular choice for thousands of international students over many years.13101 Helpful Hints for IELTSNotice how you can think ... for?)3. over many years. (When?)Note also, that in this case (and many others) all the phrases answer wh/how questions. It may behelpful at first to think of wh/how questions when trying to read...