患者，男性，78岁，进不洁食物后呕吐、腹泻3天，昏迷1天。既往高血压病史10年。查体：体温38.5℃，脉搏112次/分，呼吸26次/分，血压70/50mmHg，压眶无反应。皮肤干燥，弹性极差，心肺腹无明显异常。尿糖(

)，酮体(±)。

补液治疗首先采用（）

A．10%葡萄糖溶液

B．5%葡萄糖溶液

C．0.9%氯化钠溶液

D．0.45%氯化钠溶液

E．林格液

— You don't forget when we borrowed that reference book,  do you?  

— I can't remember now but  ___ sometime last week?     [ ]

A. might it be                  

B. could it be  

C. could it have been          

D. should it have been