实验室有失去标签的四种化肥，已知可能是（NH₄）₂SO₄、NH₄Cl、CO（NH₂）₂、K₂SO₄．现各取少许进行鉴别，下列物质中能将上述肥料一次性区别开来的试剂是（　　）

    Hello! Nice to meet you. Now let me introduce myself (自我介绍) to you. My name is Mary. I'm 12 years old. I'm from Canada and I speak English. I'm a tall girl. I have long brown hair and big blue eyes. I like music a lot. I often sing songs with my friends in my free time. I have a happy family. There are four people in my family. They are my mom, my dad, my sister and me. I like China very much and I want to visit Beijing, but I can't speak Chinese at all.

    I hope (希望) to be your friend, then we can help each other with English and Chinese.

根据材料内容，选择最佳答案。

阅读下面短文，从短文后各小题所给的A、B、C三个选项中，选出可以填入空白处的最佳选项。

                                                          The New Baby

 The picture shows a family visiting their new baby in hospital. I think it's probably the evening, because the light is 1, so the father must have brought his children 2work.

 There are two children beside the baby, a boy and a girl. The 3 is a little older than his sister. He's about six or seven. He     4 proud. The girl looks very 5 to have a new sister.

 The father has his arm around6children. He looks proud as well. The mother is sitting 7. She looks happy 8a little tired.

 The baby is in the middle. I guess it’s a girl,9she is wearing pink clothes. The baby is10 despite (尽管，不管) all the noise and excitement.