抗雪灾中，为使道路的积雪迅速融化，使用一种融雪剂硅酸钠，化学式为Na2SiO3，其中硅元素的化合价为（ ）
A：+2
B：+3
C：+4
D：+6
补全对话，每空一词。
A: ____ time do you usually get up, Bob?
B. I usually get up ____ 6 o'clock.
A. So early? What do you do then?
B: I ____ my teeth and ____ a shower. Then I eat my breakfast.
A: ____ do you go to school?
B: At 8 o'clock.
假如你是李玲,和美国的Peter是笔友,上次邮件中他提到想了解你对音乐的爱好,以及中国的一些礼仪。现请你根据以下信息给Peter回信。
Favorite music: folk music
Favorite instrument: dizi
Reasons: …
Culture（至少三项） 1 Shake hands when meeting for the first time.
2 table manners …
3 …
注意：1邮件必须包括表格所有信息；
2词数：80左右,开头和结尾已给出(不计词数)。
Dear Peter,
It was a really nice surprise to get your email. I think it’s a great idea to keep writing to each other. You told me that you like country music.……
Look forward to receiving your letter.
Yours,
Li Lin
