When the old man recalled the old hard times, he always said, “ It was the first time that I ____ a full meal. I remembered it forever.”

A．have eaten

B．had eaten

C．were eating

D．ate

化脓性骨髓炎是涉及什么组织的感染（）

A.骨髓

B.骨皮质和骨髓

C.骨膜和骨髓

D.骨膜、骨皮质和骨髓

E.骨皮质和骨膜