单项选择题

How long have the woman been working in the lab

A． Four years.
B． Just three years.
C． Almost three years.
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单项选择题
Where is Mr. Li
A． He is on holiday.
B． He is out for lunch.
C． He is on a trip.
单项选择题
A．TextB．JobC．DiplomaD．Opportunity
A．Text
B．Job
C．Diploma
D．Opportunity
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