Circus tigers, although they have been tamed, can _____ attack their trainer.
Part of the reason Charles Dickens loved his own novel, David Copper field, was __________ it was rather closely modeled on his own life.
It has been proved __________ eating vegetables in childhood helps to protect you against serious illnesses in later life.
The reason why he was sent to the hospital was __________ he was ill.
The speaker spoke of some writers and some books __________ were popular then.
I refuse to accept the blame for something __________ was someone else's fault.