【单选题】
John Preston was tired()living in east London, in which he had moved after his wife's death.
A、to
B、of
C、at
D、for
A、to
B、of
C、at
D、for
A、"john"=="john" B、"john".equals("john") C、"john"="john" D、"john".equals(newButton("john"))
A、"john"=="john" B、"john".equals("john") C、"john"="john" D、"john".equals(new String("john"))