题目

--- Mr. Brown left for London long ago. ---That's a pity. I wish ___.   A. I meet him. B. I'll have met him C. I had met him D. I'd meet him   答案：C如图所示，闭合开关S后，电压表V1的示数为6V，电压表V2的示数为2V，则灯L2两端的电压为（　　）A. 6V B. 2V C. 4V D. 无法判断