Some of the members demanded to know why they had been kept           the true facts until they reached the present critical stage.

A．in view of

B．in honor of

C．in place of

D．in ignorance of

海洋中的能源十分丰富，在以下设想中，你认为最没有可能实现的是：

A．建立海底牧场

B．建立海底农场

C．陆地动物大量迁入海底生存

D．开发潮汐能