How many novels have been published during the lifetime of William Faulkner

A．unless it is an emergency operation
B．in spite of improvement in modern surgery
C．because they think modern drugs are dangerous
D．because they do not believe they need anesthetics

A．it is difficult to find organs of exactly the same size
B．only identical twins can give permission for their organs t~ be exchanged
C．the body's tendency to reject alien tissues
D．the patient is not allowed to use drugs after them