根据句意，用括号内所给词的适当形式填空。

1. There are some ______(piano) in the room.

2. What club do you want _____ (join)?

3. May I _____ (swim) here?

4. His mother is a ______(music).

5. That is ______ (we) classroom.

女性，38岁，既往有风湿性心脏病病史，近2周有持续性发热，全身乏力、食欲减退，经检查初步诊断为亚急性细菌性心内膜炎，则在体格检查中不可能有（）.

A.皮肤、口腔黏膜上的瘀点

B.心脏杂音可无改变

C.严重贫血

D.环形红斑

E.指（趾）甲下点片状出血