单项选择题

A．It estimates
B．It is estimated
C．It confirms
D．It is confirmed
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单项选择题
A．so a dreadful diseaseB．so dreadful a diseaseC．a such dreadful diseaseD．such dreadful a disease
A．so a dreadful disease
B．so dreadful a disease
C．a such dreadful disease
D．such dreadful a disease
填空题
N
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