根据句意或提示写出合适的单词。

1. -How many w____ are there in 8 year?

    -There are fifty-two.

2. T____ is the third (第三的) day of a week.

3. Friday comes after T____.

4. Seven minus four ____ (be) three.

5. We have eight subjects this t____.

6. Wang Hua is from China. She is C____.

7. -What's the E____ for "动车"?  

    -Sorry, I don't know.

8.  I'm i____ in Art.  I like drawing pictures.

患者男性，因上前牙牙龈反复出现瘘管，X线片显示根管钙化，经过多次正规治疗后无效，拟行根尖手术

下列说法错误的是

A．根尖切除的长度为2mm

B．理想修复形式是牙根面形成硬骨板，与根周硬骨板相连

C．牙根断面为唇颊向斜面

D．倒充填术备洞深度为1～2mm

E．玻璃离子水门汀可作为倒充填术的充填材料