女，46岁，左上后牙突然肿起2天。2周前刚结束龈下刮治治疗，急诊诊断为急性牙周脓肿，检查未见明显的局部刺激因素，脓肿形成最可能的原因是（）。

A.牙髓炎症

B.食物嵌塞

C.口腔卫生保持不良

D.牙周袋深处牙石未刮净

E.创伤

根据下面所提供的情景，在每个空白处填入一个适当的句子，使其意义连贯、完整。

Philip: Good morning, Dad. 1.                                           

Grandpa: Oh, I'm cleaning my fishing rod. Have you remembered our fish trips?

Philip: 2.                                         

Grandpa: Have you remembered catching your first fish?

Philip: How can I forget! I fell out of the boat! But 3.                                          

Grandpa: Yes, we did. Maybe we should do it again.

Philip: What about tomorrow?

Grandpa: 4.                                           

Philip: Don't worry. My paper work will wait. I want to spend more time with Robbie.

Grandpa: Oh, Robbie will be happy. I'm too, son.

Philip: Well, 5.                                           

Grandpa: Radio says sunny.

Philip: Well, I'll tell Robbie. And thanks, Dad.

Grandpa: Don't thank me. I'm just being a grandfather.