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?                  

“倘使我们说，中国传统政治是专制的，政府由一个皇帝来独裁……”“政府由一个皇帝来独裁”达到顶峰的标志是（    ）

680L=____dm³=____m³

12/（____）=3÷4=（____）/12=15÷____ =____（填小数）

二甲醚(C₂H₆O)作为一种新能源，有关说法正确的是(  )