---May I speak to Mr. Smith?

---Sorry, he           . Can I take a message?

A．sleeps

B．is sleeping

C．sleep

D．sleeping

最常见的肠外阿米巴病为

A．阿米巴肺脓肿

B．阿米巴肝脓肿

C．原发性阿米巴脑膜脑炎

D．皮肤型阿米巴病

E．阿米巴脑脓肿