单项选择题
A．More than she does at present. B．Less than she does at present. C．As much as England did in the sixteenth century. D．All of her gross national income.
A．have never existed B．have all died out C．may exist in the future D．are in existence
A．is very confused about the origin of the Earth B．might possibly reach life outside the C．believes it is possible to step off the Earth D．is historically incapable of exploring the universe