The reason _______ he was late again was that he was caught in a traffic jam in the rush hour.
. It _____ have been Tom that parked the car here, as he is the only one with a car.
. Though money, his parents managed to send him to university.
. The flu is believed by viruses that like to reproduce in the cells inside the human nose and throat.
. His mother suggested he ______ to see the doctor, because his pale face suggested he ____ ill.
. What I need is _____ book that contains ______ ABC of oil painting.