A．was deep in thought of his past
B．was thinking of who Lee was
C．was thinking of how to teach his class
D．was having a talk with another passenger
A．the task for Cosgrove is quite heavy
B．the students are enthusiastic about history study
C．the students have little interest in history study
D．West Milford once was a factory town
A．Only the students in high school were poor in history study.
B．Only college students could not study history well.
C．Students at every level have poor knowledge of history.
D．All American' s knowledge of history was poor.
A．Headache.
B．Ban.
C．Pleasure.
D．Opportunity.