已知数列$\sqrt{5}$,$\sqrt{11}$,$\sqrt{17}$,$\sqrt{23}$,$\sqrt{29}$,$\cdots$，则5$\sqrt{5}$是它的第（　　）项．

复方冬青油软膏具有强力迅速镇痛作用。其有效成分的分子模型如下图，

其化学式为C₈H₈O₃。下列说法中不正确的是   （   ）

A.It's my brother's.

B.No, I didn't.

C.I'm sorry.

D.Yes, I do.

E.I got up at seven thirty.

(____)1. Did you watch TV last night?      

(____)2. Do you usually help your parents?

(____)3. You shouldn't go to school late.   

(____)4. When did you get up this morning?

(____)5. Whose coat is it?