1 . Thanks to great advances in fundamental research, a series of genetic therapies has arrived, or________(arrive), in clinics to treat blood cancer and other fatal diseases. （所给词的适当形式填空）

2 . ________ to deliver the urgent dispatch to the officer ________.

A．Every means were tried; immediately	B．Every means was tried; instantly
C．All means were tried; currently	D．All means was tried; temporarily

3 . Plato believed that talent and intelligence _________genetically and thus _________in children born to all classes, although his proposed system of selective public education for an educated minority of the population does not really follow a democratic model.

A．is not distributed, is to be found	B．are not distributed, are to be found
C．is not distributed, has been found	D．are not distributed, have been found