根据句意及首字母提示完成句子。

1. —Where's your friend?

   —She's sitting b______ here deskmate.

2. That musician has w______ many songs.

3. —Has your father been a______?

    —Yes. He has been to many countries.

4. Zhang Ziyi is very famous. He Meifeng has always wanted to m______ her!

5. How many tickets can you buy if they are all s______ out?

急性不典型肾炎诊断中最有价值的生化指标为（）

A.ASO升高

B.红细胞沉降率增快

C.血清补体C3下降

D.血浆蛋白明显下降

E.大量蛋白尿