—Bob, look what you have done! You ruined the experiment.—It’s not my fault. I just carried out the instructions _____.
They chatted ____ coffee about their experience as volunteers during the charity.
A programmer may make mistakes in a wrong analysis of the situation _____ the programme was based.
__________ the directions exactly, you will never get confused.
Some people have called ________ the worst period ever for Pop Music.
Only after he had spent several nights working on the math problem _______ to wonder whether the problem was wrongly set.