单项选择题
A．a number of B．the number of C．the amount of D．an amount of
A．not reach his intelligence in his life B．go beyond his intelligence limits in rich surroundings C．still become a genius if he should be given special education D．become a genius
A．they had long lost heart in class performance B．they were absent from class too often C．they didn"t get on well with other students D．they were so much cut off" from the rest of the class