Ever since my brother graduated from the university, he _______ in the present company for 15 years and he is now chief engineer of the company.
It was because of the bad weather _______ the football match had to be put off.
Tom always prefers _________ rather than _______ a bike.
The doctor insisted that I _________ more fruit and vegetables.
He appears to be strong and healthy but, __________ he suffers from a weak heart.
A number of books in the library ____ been stolen so that the number of them ____ smaller than before.