For questions 1 through 2, complete the text by picking the best entry for each blank from the corresponding column of choices.
　 Neurogenesis, the (i) ______ by which the brain generates neurons, is most (ii) ______ during prenatal development.

A、
A
B、
B
C、
C
D、
D
E、
E
F、
F

【正确答案】 B、E

【答案解析】

“Neurogenesis”意为神经形成是一种神经活动，故(i)位置选择B项，(ii)位置选择E项。