根据句子内容完成已给了首字母的单词。

1. Tom asked me what that day was and I told him it was M______.

2. Mary i______ Tim to her birthday party but Tim couldn't, because he had lots of homework to do.

3. When I phoned Xiao Ming, he was playing s______.

4. We will go to the movie with our parents on W______.

5. Thank you for your invitation to visit, but I have to go to the d______. I have got a toothache.

6. You should write everything you have to do next week on the c______.

7. This Sunday I will have a p______ lesson. I'll learn some new music.

8. Mary can't go on a trip. She has to study for a g______ test.

下列有关钠的叙述正确的是 [ ]

①钠在空气中燃烧生成氧化钠 ②金属钠可以保存在石蜡油或煤油中 ③钠可以与食盐溶液反应

④金属钠有强还原性，弱氧化性 ⑤钠不能置换出金属活动性顺序表中钠后面的金属

A．②④

B．②③

C．②③⑤

D．②③④