下述哪种药物可以降低慢性心力衰竭死亡率（）

A.地高辛

B.CCB

C.硝酸盐

D.ACEI

E.慢心律

阅读对话，填写适当的单词使对话完整通顺。每空一词。

A: Hi, Tina! I haven't 1______ you for a long time. 2______ have you gone?

B: Oh, I've been to Australia 3______ vacation. I had a great 4______ there.

A: That's great! I hope one day I will go there, 5______.

B: What have you been 6______ these days?

A: I've been 7______ for a job. I like to travel so I want to be a 8______ attendant.

B: Have you got the job?

A: I'm afraid not. These days I have been 9______ English at a language school. 10______ I have to

    speak English well if I want to get the job.

B: Well, I hope you can improve your English soon.

A: Thank you!