In today's Question and Answer of the Week, we find out if expresssions we often hear in Hollywood movies are suitable for use in everyday conversation.

Neil and Helen explore situations where 'what the hell' and 'what on earth' are used and examine the appropriateness of each situation. Do you know when you should use these phrases?

If you have any other questions about the English language please email us.

如果大家有英语学习上的问题请随时给我们来信。我们的邮箱是questions.chinaelt@bbc.co.uk.