用所给单词的适当形式填空。

1. What about           _ ( sing) this song in English?

2. The weather           _ ( be) windy today.

3. There are some students ______ (play) on the playground.

4. Look! The dog _  __    (eat) the meat.

5. It's              ( cloud). It's going to rain.

6. It often         __ (snow) in the north of China in winter.

7. I enjoy _           (I) very much in the game.

8. They have a lot of' fun _  _    _ ( dance)  at the party.

9. I'm very _          (excite) to hear the good news.

10. It's ______ (sun) today. The sun is shining brightly in the sky.

将金属混合物6.36g跟足量稀硫酸反应生成0.3g氢气，则该金属粉末的可能组成是（　　）

A．Mg与Al

B．Mg与Fe

C．Fe与Zn

D．Al与Zn