单项选择题

There（）little change in the patient's condition since he was taken to the hospital.

A．is
B．has been
C．have been
D．was

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单项选择题
The gray building is where the workers live, and the white one is where the spare parts（）

A．are produced
B．are producing
C．produced
D．being produced
单项选择题
Dr. Smith, together with his wife and two sons,（）to arrive on the evening flight.

A．are
B．are going
C．is
D．will be
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