Does my question sound enough— I don’t think so. You can ask more by using “could” instead of “can”.

The train was crowded and I had to get into a carriage _______ there were already seven other passengers.

The book written by Mr. Jackson ______ people from all walks of life, making it the best seller in England.

We all know that a smile is usually a sign ________ people feel friendly and happy.

Without plenty of oral practice,you’ll find it hard to______a conversation with native English speakers. [ ]