风心病左房室瓣狭窄伴房颤最易出现（）
A.呼吸道感染
B.心力衰竭
C.心律失常
D.亚急性感染性心内膜炎
E.栓塞
参考答案：E
_____ I was on a train and a Chinese university lecturer told me a story about his sister and
brother-in-law.[ ]
A. When
B. While
C. As
D. Once
Jim sold most of his things. He has hardly（）left in the house.
A. anything
B. everything
C. nothing
D. something
