根据所给首字母，填写单词，补充完整句子。

1. She was d_______, so she can't hear.

2. This book is about space t_______. It's very interesting.

3. — When did you a_______ in Beijing? 

    — I got there yesterday.

4. The students are s_______ English words in the class now.

5. Daming is going to have a birthday p_______ in his home tomorrow.

下列何者不属于固定矫治器的优点（）。

A.固位良好，支抗充足

B.能使多数牙移动，整体移动和转距扭矩等移动容易

C.能控制矫治牙的移动方向

D.施力过大疼痛时，患者可自行卸下，避免损伤牙体牙周组织

E.体积小，较舒适