患者男性，32岁，长期居住在东北的缺硒山区，近3年出现心悸、气短，伴双下肢浮肿，无烟酒嗜好，体格检查发现心界向左下扩大，心音低钝，心律不齐，肝大。首先应考虑的诊断是（）

A.病毒性心肌炎

B.克山病

C.风湿性心脏病

D.冠状动脉粥样硬化性心脏病

E.先天性心脏病

用所给单词的适当形式填空。

1. Jim's father is a doctor, while ______ (my) is a teacher.

2. I went to your house yesterday, but you ______ (not) in.

3. I spent ten minutes ______ (make) the bed this morning.

4. They ______ (have) a test the day after tomorrow.

5. Mrs. White usually ______ (have) lunch at home, but she ______

    (not have) lunch at home yesterday.