Here is an extract from my grammar practice book.
A young man was walking through a supermarket. Suddenly he noticed that he (follow) by an old lady.
As far as I understand, in that situation we should use Past Simple for short and Past Continuous for long actions. The man from the example is being followed, thus we must use Passive Voice.
So, here we have
A young man was walking through a supermarket. Suddenly he noticed that he was being followed by an old lady.
Is it correct?
I kindly ask you to clarify it because the key says was followed.
Thank you in advance:)