单项选择题

Since he left the university, he______in an accounting company.

A．has been working
B．had worked
C．had been working
D．was working
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单项选择题
The goods______when we arrived at the airport.
A．were just unloading
B．were just been unloading
C．had just unloaded
D．were just being unloaded
单项选择题
Let's start working on the project, ______
A．shall we
B．will we
C．don't we
D．aren't we
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