根据句意及所给提示，补全单词或用单词、固定短语、固定搭配的正确形式填空。

1. It's a good habit to brush our teeth t______________ a day.

2. We need eleven _______________ (play) for our soccer team.

3. What a _______________ (sun) day it is today! Let's go to the park.

4. Steven _______________ (参加) the school dancing club last year.

5. How can you type and talk ______________ (同时)?

患者男，35岁。牙龈疼痛、出血3天。近来工作繁忙，经常加班至深夜，吸烟20支／天。检查：口臭明显，上下前牙区牙龈有自动出血，龈 * * 尖端变平，表面覆盖有灰白色物，擦去后可见（+）血面。最可能的诊断是（）

A.慢性龈缘炎

B.慢性牙周炎

C.急性龈 * * 炎

D.快速进展性牙周炎

E.急性坏死性溃疡性龈炎