______ the police thought he was the most likely one, since they had no exact proof about it, they could not arrest him.
I am surprised that you should have been fooled by such a (an) ___ trick.
Email, as well as letters, ___________ an important part in daily communication..
The teacher suggests ____________ speaking English as often as possible .
Having afternoon tea is an English ______.
My cousin went abroad at_____ age of eighteen.