单项选择题

In his researches on ______ diseases, he discovered many facts about the lungs of animals and human beings.

A．inherited
B．chronic
C．infectious
D．pulmonary
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单项选择题
How did the author feel early in the morning
A．He felt frightened by the war.
B．He felt cheerful.
C．He felt puzzled by the dramatic situations around him.
D．He felt burdened with responsibilities.
单项选择题
When he woke up in the morning, he would ______.
A．visit Mrs. Left and Mrs. Right
B．roll up the curtains
C．try to work out his plans for the day
D．make Mrs. Left argue with Mrs. Right
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