During the earthquake,the great part of damage and loss of life was_____the poor quality of the buildings, which couldn’t fight against its force.
We were swimming in the lake _______ suddenly it began to rain heavily.
Don’t try to cheat in the exam; you will never _______ it.
I had been looking for the book for two days _______ I found it at last.
She never laughed, _______ lose her temper.
Most companies’ marketing effort is focused on getting customers, with little attention _______ to keeping them.