The number of the stamps _____ limited, so a number of people _____ to have a look at them.
The research is so designed that once _______ nothing can be done to change it.
“What do you think made Mary so upset?” “_______ her new bike.”
“How do you deal with the disagreement between the company and the customers?” “The key ______ the problem is to meet the demand ______ by the customers.”
Finding her car stolen, _______.
A cook will be immediately fired if he is found _______ in the kitchen.