20世纪20年代，孙中山先生实现了由旧三民主义到新三民主义的伟大飞跃，促使孙中山先生思想发生转变的根本原因是

A．坚持民主革命的精神

B．多次革命斗争的失败

C．中国社会主要矛盾的变化

D． * * 国际和中 * * 党的帮助

As some experts say, shopping by television will never take ________ place of shopping in stores,

because many people find shopping at a store is ________ great enjoyment.[ ]

A. /; a  

B. the; a

C. a; the  

D. a; /