He hurried to the booking office only ______ that all the tickets had been sold out.

A．told

B．to tell

C．to be told

D．telling

该患者还需要做哪些检查进一步明确诊断

A．骨髓检查
B．血小板计数、出血凝血时间
C．血培养
D．网织红细胞
E．血小板抗体