Lawrence Craven, a doctor from the USA, is the author of several published reports, one of ________ introduced the idea in 1953 ________ aspirin could reduce the risk of heart attacks.
He has left his book here on _____, so that you can read it.
I remember her face but I cannot _____ where I met her.
The climbers _____ their ambition by reaching the summit of the mountain.
It has always been the _____ of our firm to encourage workers to take part in social activities.
The most important _____ of his speech was that we should all work whole-heartedly for the people.