--- Excuse me. Could you tell me       ?

--- It will leave at 4:00 p.m.

A．how will you go to Shanghai

B．how you will go to Shanghai

C．when will the bus leave for Shanghai

D．when the bus will leave for Shanghai

根据“强化理论”，如欲激励一个人，通常：（）

A.奖励和惩罚同样有效；

B.惩罚更为有效；

C.奖励更为有效；

D.因人而异，不能一概而论。