Such is         human nature that many people don’t value         things they possess until they’ve lost them .

A．不填；不填

B．不填;the

C．the; 不填

D．a; the

慢性扁桃体炎属于（）

A.慢性肉芽肿性炎症

B.反复发作的急性扁桃体炎的慢性炎症状态

C.病毒引起多见

D.累及中老年人

E.男性明显多于女性