Tick
all grammatically correct sentences:

Have you ever been sailing?
How long have you worked here?
I haven’t been hearing that old song since I was a child.
I’ve been watching a lot of films lately… maybe too many.
I’ve gone to the night club a lot recently.
Please don’t come in – we haven’t been finishing yet.
She’s the most talented artist I’ve every met.
This room has been empty since our son left home.
Those people have been calling me five times today.
We’ve been giving three lectures this week.

К сожалению, у нас пока нет статистики ответов на данный вопрос, но мы работаем над этим.