闭合性气胸肺压迫（）%可无症状
A.60
B.50
C.40
D.30
E.20
参考答案：D
在“予治方最久。有方之良者，辄为疏之”中，“疏”之义为（）
A.疏通
B.书写
C.注释
D.分条记述
No one answered my phone, so the Whites ______ be at home. [ ]
A. shouldn't
B. couldn't
C. mustn't
D. needn't
