— What were you up to when your parents came in?

— I＿＿for a while and＿＿some reading.

A．was playing； was going to do

B．played； did

C．had played； was going to do

D．had played； did

为确诊伤寒，阳性率最高的检测是（）。

A.血培养

B.骨髓培养

C.尿培养

D.胆汁培养

E.便培养