单项选择题

A．He worked for a medical periodical.
B．He published a paper about computer science.
C．He suggested a link between smoke and lung cancer.
D．He opened a hospital with his partner.
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单项选择题
A．A city guide.B．A librarian.C．A computer expert.D．A registrar.
A．A city guide.
B．A librarian.
C．A computer expert.
D．A registrar.
单项选择题
A．Because he didn’’t feel very well.B．Because he overslept and missed the lunch.C．Because he didn’’t hear the lunch bell.D．Because he thought he couldn’’t afford it.
A．Because he didn’’t feel very well.
B．Because he overslept and missed the lunch.
C．Because he didn’’t hear the lunch bell.
D．Because he thought he couldn’’t afford it.
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