--__________ was it_________ they discovered the entrance to the underground place?--Totally by chance.
---Shall we go to the station on foot? ---_______.
_______ you get on well with a number of people, you are usually friends with only a few .
---- It’s the office! So you _____ know eating is not allowed here.---- Oh, sorry.
You should write a _____________ composition every other week.
Although _______ my opinion, the old professor didn’t come up with his own.