单项选择题

A．The lack of qualified personnel.
B．A decline in the number of customers.
C．Difficulty in finding suitable sites.
D．Increases transportation costs.
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单项选择题
A．He wanted to change the appointment.B．He called Dr. Smith to confirm the appointment.C．He was confused about the date of the appointment.D．He can’t see Dr. Smith until tomorrow.
A．He wanted to change the appointment.
B．He called Dr. Smith to confirm the appointment.
C．He was confused about the date of the appointment.
D．He can’t see Dr. Smith until tomorrow.
单项选择题
A．During early childhood.B．In a person’s teens.C．In a person’s twenties.D．After a person turns fifty.
A．During early childhood.
B．In a person’s teens.
C．In a person’s twenties.
D．After a person turns fifty.
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