It is rude _____you to say so. [ ]
A. of
B. for
C. on
D. with
答案：A
在卵泡生长发育中，卵母细胞周围的细胞变为方形，并增生成为：
A．卵泡内膜细胞
B．卵泡外膜细胞
C．颗粒细胞
D．卵细胞
E．黄体细胞
The magician picked several persons from the audience and asked them to help him with the performance.
A．by accident
B．on occasion
C．at random
D．on an average
of
of