— Hey! Everyone in the office was at the dinner party in honor of Mr. Charles except you. What happened?— I ______ after Mike, my colleague. He was badly ill.
The room was so quiet that she could hear the _____ of her heart.
The new safety regulations were agreed on after _____ with the work-force.
His test results are not very _____. He does well one week and badly the next.
Scientists think they have _____ in their attempt to find the causes of some major dieases.
If you ever have the _____ to go abroad to work, you should take it.