①    ____升

②    ____毫升

在Na₂SO₄、NaCl、NaOH的混合溶液中，Na⁺、SO_４^2-、OH-的个数比是8：1：2，则溶液中Na₂SO₄、NaCl、NaOH的物质的量之比是（  ）    

Dear Annie，

    Thank you for your letter.Here is something about my school.

    I go to school 1 Monday to Friday.We have four 2in the morning and two in the afternoon.3 we have many things 4 after class? Of course! 5Monday and Thursday afternoon we do sports. On Tuesday afternoon, all of us have a 6 class.I like drawing 7 I can't draw well. And on Thursday afternoon, we have a singing class.On Friday afternoon we practice speaking 8My Chinese friends would like to speak with me in English.They think I am like an English 9Isn't it great？

    On Saturdays and Sundays I don't go to school.Very often my family and I go to the 10 and have a good time there.

Yours,

Lucy