– Do you know William failed the exam, Jenny? -- _____? As far as I know, he is always working hard.
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.
After Billy said he would ride a mountain bicycle, his father _____ to him and bought him one.