单项选择题

Questions 19 to 21 are based on the conversation you have just heard.

A．That there was no effect.
B．That it improved operations.
C．That operations became less efficient.
D．That the employees became dissatisfied.
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单项选择题
A) To visit the Modem Museum. C) To visit museums. B) To make a good plan. D) To visit a music school.
A) To visit the Modem Museum. C) To visit museums.
B) To make a good plan. D) To visit a music school.
单项选择题
A) Disadvantages of tall buildings. C) The Crystal Palace Exhibition. B) Modem elevators. D) The invention of the elevator.
A) Disadvantages of tall buildings. C) The Crystal Palace Exhibition.
B) Modem elevators. D) The invention of the elevator.
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